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Luo J, Wen Y, Jia X, Lei X, Gao Z, Jian M, Xiao Z, Li L, Zhang J, Li T, Dong H, Wu X, Gao E, Jiao K, Zhang J. Fabricating strong and tough aramid fibers by small addition of carbon nanotubes. Nat Commun 2023; 14:3019. [PMID: 37230970 DOI: 10.1038/s41467-023-38701-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 05/12/2023] [Indexed: 05/27/2023] Open
Abstract
Synthetic high-performance fibers present excellent mechanical properties and promising applications in the impact protection field. However, fabricating fibers with high strength and high toughness is challenging due to their intrinsic conflicts. Herein, we report a simultaneous improvement in strength, toughness, and modulus of heterocyclic aramid fibers by 26%, 66%, and 13%, respectively, via polymerizing a small amount (0.05 wt%) of short aminated single-walled carbon nanotubes (SWNTs), achieving a tensile strength of 6.44 ± 0.11 GPa, a toughness of 184.0 ± 11.4 MJ m-3, and a Young's modulus of 141.7 ± 4.0 GPa. Mechanism analyses reveal that short aminated SWNTs improve the crystallinity and orientation degree by affecting the structures of heterocyclic aramid chains around SWNTs, and in situ polymerization increases the interfacial interaction therein to promote stress transfer and suppress strain localization. These two effects account for the simultaneous improvement in strength and toughness.
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Affiliation(s)
- Jiajun Luo
- Beijing National Laboratory for Molecular Sciences, School of Materials Science and Engineering, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies, Beijing Science and Engineering Center for Nanocarbons, Peking University, 100871, Beijing, China
- Beijing Graphene Institute (BGI), 100095, Beijing, China
| | - Yeye Wen
- Beijing National Laboratory for Molecular Sciences, School of Materials Science and Engineering, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies, Beijing Science and Engineering Center for Nanocarbons, Peking University, 100871, Beijing, China
- Beijing Graphene Institute (BGI), 100095, Beijing, China
| | - Xiangzheng Jia
- Department of Engineering Mechanics, School of Civil Engineering, Wuhan University, 430072, Wuhan, China
| | - Xudong Lei
- Institute of Mechanics, Chinese Academy of Sciences, 100190, Beijing, China
- School of Engineering Science, University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Zhenfei Gao
- Beijing Graphene Institute (BGI), 100095, Beijing, China
| | - Muqiang Jian
- Beijing Graphene Institute (BGI), 100095, Beijing, China
| | - Zhihua Xiao
- Beijing National Laboratory for Molecular Sciences, School of Materials Science and Engineering, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies, Beijing Science and Engineering Center for Nanocarbons, Peking University, 100871, Beijing, China
- Beijing Graphene Institute (BGI), 100095, Beijing, China
| | - Lanying Li
- China Bluestar Chengrand Chemical Co., Ltd, 611430, Chengdu, China
| | - Jiangwei Zhang
- Science Center of Energy Material and Chemistry, College of Chemistry and Chemical Engineering, Inner Mongolia University, 010021, Hohhot, China
| | - Tao Li
- Beijing Graphene Institute (BGI), 100095, Beijing, China
| | - Hongliang Dong
- Center for High Pressure Science and Technology Advanced Research, 201203, Shanghai, China
| | - Xianqian Wu
- Institute of Mechanics, Chinese Academy of Sciences, 100190, Beijing, China.
- School of Engineering Science, University of Chinese Academy of Sciences, 100049, Beijing, China.
| | - Enlai Gao
- Department of Engineering Mechanics, School of Civil Engineering, Wuhan University, 430072, Wuhan, China.
| | - Kun Jiao
- Beijing National Laboratory for Molecular Sciences, School of Materials Science and Engineering, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies, Beijing Science and Engineering Center for Nanocarbons, Peking University, 100871, Beijing, China.
- Beijing Graphene Institute (BGI), 100095, Beijing, China.
| | - Jin Zhang
- Beijing National Laboratory for Molecular Sciences, School of Materials Science and Engineering, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies, Beijing Science and Engineering Center for Nanocarbons, Peking University, 100871, Beijing, China.
- Beijing Graphene Institute (BGI), 100095, Beijing, China.
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2
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do Rosario RL, Christakopoulos F, Tervoort TA, Brunel F, McKenna TFL. Gas‐phase polymerization of ultra‐high molecular weight polyethylene with decreased entanglement density. JOURNAL OF POLYMER SCIENCE 2023. [DOI: 10.1002/pol.20230038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Affiliation(s)
- Roberta Lopes do Rosario
- Dutch Polymer Institute DPI Eindhoven The Netherlands
- CP2M UMR 5128, CNRS/UCBL/CPE‐Lyon Villeurbanne France
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3
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Pramanick R, Verma SK, Kumari R, De S, Neogi S, Neogi S. Effect of thermally induced microstructural changes on the mechanical properties and ballistic performance of poly ( p-phenylene terephthalamide) fibers. HIGH PERFORM POLYM 2022. [DOI: 10.1177/09540083221148390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Microstructural variations have a strong influence on the load transfer capacity of the high-performance polymeric fibers, which is also reflected in their ballistic property changes. The focus of the present study is to investigate thermally induced microstructural changes and their reflection on the mechanical properties and theoretical ballistic limit of poly ( p-phenylene terephthalamide) fibers by a correlation. From the quantitative analysis of XRD, thermally induced changes in unit cell a-dimension show profound sensitivity in affecting the tenacity and modulus of the fibers. Based on the physicochemical changes in FTIR and FESEM analysis, significant surface deterioration and changes in the chemical network are observed. However, dimensional variations of the crystal structure along a-direction show a stronger influence than the chemical and morphological changes, reflecting sigmoidal responses with tenacity, modulus and theoretical V50 by correlations. As an effect of unit cell dimensional variation, changes in crystallinity are resulted and lead to the loss in theoretical ballistic limit of the fibers by following first-order kinetics. Lastly, angular separation and (200) orientation angle are determined to build a global correlation with modulus and theoretical ballistic limit for quickly decoding macro-changes in terms of micro-properties. The given correlations can help to identify crystallographic transformations upon other induction techniques and view their effect on mechanical and ballistic parameters. In addition, the given approach can be extended for different ballistic materials under any environmental conditions.
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Affiliation(s)
- Rinku Pramanick
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Sanjeev K Verma
- Terminal Ballistics Research Laboratory (TBRL), Defence Research and Development Organization (DRDO), Chandigarh, India
| | - Rajesh Kumari
- Terminal Ballistics Research Laboratory (TBRL), Defence Research and Development Organization (DRDO), Chandigarh, India
| | - Sirshendu De
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Sudarsan Neogi
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Swati Neogi
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, India
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4
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Gurniak EJ, Tiwari SC, Hong S, Nakano A, Kalia RK, Vashishta P, Branicio PS. Anisotropic atomistic shock response mechanisms of aramid crystals. J Chem Phys 2022; 157:044105. [PMID: 35922358 DOI: 10.1063/5.0102293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Aramid fibers composed of poly(p-phenylene terephthalamide) (PPTA) polymers are attractive materials due to their high strength, low weight, and high shock resilience. Even though they have widely been utilized as a basic ingredient in Kevlar, Twaron, and other fabrics and applications, their intrinsic behavior under intense shock loading is still to be understood. In this work, we characterize the anisotropic shock response of PPTA crystals by performing reactive molecular dynamics simulations. Results from shock loading along the two perpendicular directions to the polymer backbones, [100] and [010], indicate distinct shock release mechanisms that preserve and destroy the hydrogen bond network. Shocks along the [100] direction for particle velocity Up < 2.46 km/s indicate the formation of a plastic regime composed of shear bands, where the PPTA structure is planarized. Shocks along the [010] direction for particle velocity Up < 2.18 km/s indicate a complex response regime, where elastic compression shifts to amorphization as the shock is intensified. While hydrogen bonds are mostly preserved for shocks along the [100] direction, hydrogen bonds are continuously destroyed with the amorphization of the crystal for shocks along the [010] direction. Decomposition of the polymer chains by cross-linking is triggered at the threshold particle velocity Up = 2.18 km/s for the [010] direction and Up = 2.46 km/s for the [100] direction. These atomistic insights based on large-scale simulations highlight the intricate and anisotropic mechanisms underpinning the shock response of PPTA polymers and are expected to support the enhancement of their applications.
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Affiliation(s)
- Emily J Gurniak
- Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-0242, USA
| | - Subodh C Tiwari
- Collaboratory for Advanced Computing and Simulations, Department of Physics and Astronomy, Department of Computer Science, Department of Chemical Engineering and Materials Science, Department of Biological Sciences, University of Southern California, Los Angeles, California 90089-0242, USA
| | - Sungwook Hong
- Department of Physics and Engineering, California State University, Bakersfield, Bakersfield, California 93311, USA
| | - Aiichiro Nakano
- Collaboratory for Advanced Computing and Simulations, Department of Physics and Astronomy, Department of Computer Science, Department of Chemical Engineering and Materials Science, Department of Biological Sciences, University of Southern California, Los Angeles, California 90089-0242, USA
| | - Rajiv K Kalia
- Collaboratory for Advanced Computing and Simulations, Department of Physics and Astronomy, Department of Computer Science, Department of Chemical Engineering and Materials Science, Department of Biological Sciences, University of Southern California, Los Angeles, California 90089-0242, USA
| | - Priya Vashishta
- Collaboratory for Advanced Computing and Simulations, Department of Physics and Astronomy, Department of Computer Science, Department of Chemical Engineering and Materials Science, Department of Biological Sciences, University of Southern California, Los Angeles, California 90089-0242, USA
| | - Paulo S Branicio
- Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-0242, USA
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5
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Yang Q, Li W, Stober ST, Burns AB, Gopinadhan M, Martini A. Effect of Aliphatic Chain Length on the Stress–Strain Response of Semiaromatic Polyamide Crystals. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Quanpeng Yang
- Department of Mechanical Engineering, University of California, Merced, 5200 N. Lake Road, Merced, California 95343, United States
| | - Wenjun Li
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 Route 22 East, Annandale, New Jersey 08801, United States
| | - Spencer T. Stober
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 Route 22 East, Annandale, New Jersey 08801, United States
| | - Adam B. Burns
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 Route 22 East, Annandale, New Jersey 08801, United States
| | - Manesh Gopinadhan
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 Route 22 East, Annandale, New Jersey 08801, United States
| | - Ashlie Martini
- Department of Mechanical Engineering, University of California, Merced, 5200 N. Lake Road, Merced, California 95343, United States
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6
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Aramid fibril aerogel from steam-exploded PPTA pulp for thermal insulation. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-021-02864-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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7
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Yang Q, Li W, Stober ST, Burns AB, Gopinadhan M, Martini A. Molecular Dynamics Simulation of the Stress–Strain Behavior of Polyamide Crystals. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00974] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Quanpeng Yang
- Department of Mechanical Engineering, University of California-Merced, 5200 N. Lake Road, Merced, California 95343, United States
| | - Wenjun Li
- ExxonMobil Research and Engineering Company, 1545 Route 22 East, Annandale, New Jersey 08801, United States
| | - Spencer T. Stober
- ExxonMobil Research and Engineering Company, 1545 Route 22 East, Annandale, New Jersey 08801, United States
| | - Adam B. Burns
- ExxonMobil Research and Engineering Company, 1545 Route 22 East, Annandale, New Jersey 08801, United States
| | - Manesh Gopinadhan
- ExxonMobil Research and Engineering Company, 1545 Route 22 East, Annandale, New Jersey 08801, United States
| | - Ashlie Martini
- Department of Mechanical Engineering, University of California-Merced, 5200 N. Lake Road, Merced, California 95343, United States
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8
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Ren H, Li P, Wu Y, Hu J, Zhang G, Yan Y. Semi‐aromatic copoly(ether ether amide): Synthesis and properties. J Appl Polym Sci 2021. [DOI: 10.1002/app.50940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hao‐hao Ren
- College of Physics Sichuan University Chengdu China
| | | | - Ya‐nan Wu
- College of Physics Sichuan University Chengdu China
| | - Jin‐bo Hu
- School of Chemical Engineering Sichuan University Chengdu China
| | - Gang Zhang
- Institute of Materials Science & Technology Analytical and Testing Center, Sichuan University Chengdu China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University Chengdu China
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9
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Yang B, Li W, Zhang M, Wang L, Ding X. Recycling of High-Value-Added Aramid Nanofibers from Waste Aramid Resources via a Feasible and Cost-Effective Approach. ACS NANO 2021; 15:7195-7207. [PMID: 33752335 DOI: 10.1021/acsnano.1c00463] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
High-performance aramid fibers are extensively applied in the civil and military fields. A great deal of waste aramid resources originating from the manufacturing process, spare parts, or end of life cycle are wrongly disposed (i.e., landfill, smash, fibrillation), causing a waste of valuable resources as well as severe environmental pollution. Although aramid nanofibers (ANFs) have recently been recently reported as one of the most promising building blocks due to their excellent properties, they suffer from an extremely high production expenditure, thereby greatly hindering their scale-up application. Herein, in this paper, from a resources-saving and cost-reductional perspective, we present a feasible top-down approach to recycle high value-added ANFs with an affordable cost from various waste aramid resources. The results indicate that although the reclaimed ANFs have a molecular weight reduction of 8.1% compared with the recycled aramid fibers, they still exhibit a molecular weight of 43.0 kg·mol-1 that represents the highest value compared to other methods. It is noteworthy that the fabrication cost of ANFs is significantly reduced (∼7 times) due to the reclamation of waste aramid fibers instead of the expensive virgin aramid fibers. The obtained ANFs show impressive tensile strength (149.2 MPa) and toughness (10.43 MJ·m-3), excellent thermal stabilities (Td of 542 °C), and a high specific surface area (65.2 m2·g-1), which endows them to be promising candidates for constructing advanced materials. Compared to the aramid pulp obtained by the traditional recycling method, ANFs show significant advantages in dimensional homogeneity, aspect ratio, dispersibility, film-forming property, and especially the excellent properties of the ANF film. In addition, the scale-up preparation of ANFs from the recycled waste aramid fibers is carried out, demonstrating it is highly economically viable. Therefore, this work provides a highly feasible and cost-effective recycle system to reclaim the waste aramid resources together with significantly reducing the preparation cost of ANFs.
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Affiliation(s)
- Bin Yang
- College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi Province Key Laboratory of papermaking Technology and Specialty paper Development, Shaanxi University of Science & Technology, No. 6, Xuefu Road, Xi'an 710021, China
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China
| | - Weiwei Li
- College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi Province Key Laboratory of papermaking Technology and Specialty paper Development, Shaanxi University of Science & Technology, No. 6, Xuefu Road, Xi'an 710021, China
| | - Meiyun Zhang
- College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi Province Key Laboratory of papermaking Technology and Specialty paper Development, Shaanxi University of Science & Technology, No. 6, Xuefu Road, Xi'an 710021, China
| | - Lin Wang
- College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi Province Key Laboratory of papermaking Technology and Specialty paper Development, Shaanxi University of Science & Technology, No. 6, Xuefu Road, Xi'an 710021, China
| | - Xueyao Ding
- College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi Province Key Laboratory of papermaking Technology and Specialty paper Development, Shaanxi University of Science & Technology, No. 6, Xuefu Road, Xi'an 710021, China
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10
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Yang C, Xu R, Tang S, Zhuang Y, Luo L, Liu X. Free H‐Bonding Interaction Sites in Rigid‐Chain Polymers and Their Filling Approach: A Molecular Dynamics Simulation Study. ADVANCED THEORY AND SIMULATIONS 2021. [DOI: 10.1002/adts.202100016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Cheng Yang
- College of Polymer Science and Engineering State Key Laboratory of Polymer Material and Engineering Sichuan University Chengdu 610065 China
| | - Ruopei Xu
- College of Polymer Science and Engineering State Key Laboratory of Polymer Material and Engineering Sichuan University Chengdu 610065 China
| | - Siyi Tang
- College of Polymer Science and Engineering State Key Laboratory of Polymer Material and Engineering Sichuan University Chengdu 610065 China
| | - Yongbing Zhuang
- State Key Laboratory of Biochemical Engineering Institute of Process Engineering University of Chinese Academy of Sciences Beijing 100190 China
| | - Longbo Luo
- College of Polymer Science and Engineering State Key Laboratory of Polymer Material and Engineering Sichuan University Chengdu 610065 China
| | - Xiangyang Liu
- College of Polymer Science and Engineering State Key Laboratory of Polymer Material and Engineering Sichuan University Chengdu 610065 China
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11
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Christakopoulos F, Troisi EM, Sologubenko AS, Friederichs N, Stricker L, Tervoort TA. Melting kinetics, ultra-drawability and microstructure of nascent ultra-high molecular weight polyethylene powder. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Tang S, Ye X, Gao Y, Xu R, Luo L, Liu X. Protic acid-induced LCST rigid-chain polymeric gel with enhanced blue emission via weakened conjugation effect. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110333] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Seung Kwon Y, Lee J, Hwang G, Gyu Jeong Y. Structural, Optical and Thermal Characterization of Wholly Aromatic Poly(ether amide)s Synthesized by Phosphorylation‐Based Condensation Polymerization. ChemistrySelect 2020. [DOI: 10.1002/slct.202002341] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Young Seung Kwon
- Department of Advanced Organic Materials and Textile System Engineering Chungnam National University Daejeon 34134 Republic of Korea
| | - Ji−Su Lee
- Department of Advanced Organic Materials and Textile System Engineering Chungnam National University Daejeon 34134 Republic of Korea
| | - Gyu‐Hyun Hwang
- Department of Advanced Organic Materials and Textile System Engineering Chungnam National University Daejeon 34134 Republic of Korea
| | - Young Gyu Jeong
- Department of Advanced Organic Materials and Textile System Engineering Chungnam National University Daejeon 34134 Republic of Korea
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14
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Shi Y, Qiu T, Tuo X. The bottom‐up synthesis for aramid nanofibers: The influence of copolymerization. J Appl Polym Sci 2020. [DOI: 10.1002/app.49589] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yifei Shi
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering Tsinghua University Beijing People's Republic of China
| | - Teng Qiu
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education Beijing University of Chemical Technology Beijing People's Republic of China
| | - Xinlin Tuo
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering Tsinghua University Beijing People's Republic of China
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15
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Hegde M, Yang L, Vita F, Fox RJ, van de Watering R, Norder B, Lafont U, Francescangeli O, Madsen LA, Picken SJ, Samulski ET, Dingemans TJ. Strong graphene oxide nanocomposites from aqueous hybrid liquid crystals. Nat Commun 2020; 11:830. [PMID: 32047162 PMCID: PMC7012915 DOI: 10.1038/s41467-020-14618-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 01/20/2020] [Indexed: 11/23/2022] Open
Abstract
Combining polymers with small amounts of stiff carbon-based nanofillers such as graphene or graphene oxide is expected to yield low-density nanocomposites with exceptional mechanical properties. However, such nanocomposites have remained elusive because of incompatibilities between fillers and polymers that are further compounded by processing difficulties. Here we report a water-based process to obtain highly reinforced nanocomposite films by simple mixing of two liquid crystalline solutions: a colloidal nematic phase comprised of graphene oxide platelets and a nematic phase formed by a rod-like high-performance aramid. Upon drying the resulting hybrid biaxial nematic phase, we obtain robust, structural nanocomposites reinforced with graphene oxide.
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Affiliation(s)
- Maruti Hegde
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Murray Hall, 121 South Road, Chapel Hill, NC, 27599-3050, USA
- Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS, Delft, The Netherlands
| | - Lin Yang
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Francesco Vita
- Dipartimento di Scienze e Ingegneria della Materia, dell'Ambiente ed Urbanistica and CNISM, Università Politecnica della Marche, Via Brecce Bianche, 60131, Ancona, Italy
| | - Ryan J Fox
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Murray Hall, 121 South Road, Chapel Hill, NC, 27599-3050, USA
| | - Renee van de Watering
- Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS, Delft, The Netherlands
| | - Ben Norder
- Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ, Delft, The Netherlands
| | - Ugo Lafont
- European Space Technology and Research Centre, European Space Agency, Keplerlaan 1, 2201 AZ, Noordwijk, The Netherlands
| | - Oriano Francescangeli
- Dipartimento di Scienze e Ingegneria della Materia, dell'Ambiente ed Urbanistica and CNISM, Università Politecnica della Marche, Via Brecce Bianche, 60131, Ancona, Italy
| | - Louis A Madsen
- Department of Chemistry and Macromolecules Innovation Institute, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Stephen J Picken
- Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ, Delft, The Netherlands
| | - Edward T Samulski
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Murray Hall, 121 South Road, Chapel Hill, NC, 27599-3050, USA
| | - Theo J Dingemans
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Murray Hall, 121 South Road, Chapel Hill, NC, 27599-3050, USA.
- Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS, Delft, The Netherlands.
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16
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Tiwari SC, Shimamura K, Mishra A, Shimojo F, Nakano A, Kalia RK, Vashishta P, Branicio PS. Hydrogen Bond Preserving Stress Release Mechanism Is Key to the Resilience of Aramid Fibers. J Phys Chem B 2019; 123:9719-9723. [PMID: 31644290 DOI: 10.1021/acs.jpcb.9b08168] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ab initio molecular dynamics simulations of shock loading on poly(p-phenylene terephthalamide) (PPTA) reveal stress release mechanisms based on hydrogen bond preserving structural phase transformation (SPT) and planar amorphization. The SPT is triggered by [100] shock-induced coplanarity of phenylene groups and rearrangement of sheet stacking leading to a novel monoclinic phase. Planar amorphization is generated by [010] shock-induced scission of hydrogen bonds leading to disruption of polymer sheets, and trans-to-cis conformational change of polymer chains. In contrast to the latter, the former mechanism preserves the hydrogen bonding and cohesiveness of polymer chains in the identified novel crystalline phase preserving the strength of PPTA. The interplay between hydrogen bond preserving (SPT) and nonpreserving (planar amorphization) shock release mechanisms is critical to understanding the shock performance of aramid fibers.
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Affiliation(s)
- Subodh C Tiwari
- Collaboratory for Advanced Computing and Simulations, Department of Physics & Astronomy, Department of Computer Science, Department of Chemical Engineering & Materials Science, and Department of Biological Sciences , University of Southern California , Los Angeles , California 90089-0242 , United States
| | - Kohei Shimamura
- Graduate School of System Informatics , Kobe University , Kobe 657-8501 , Japan
| | - Ankit Mishra
- Collaboratory for Advanced Computing and Simulations, Department of Physics & Astronomy, Department of Computer Science, Department of Chemical Engineering & Materials Science, and Department of Biological Sciences , University of Southern California , Los Angeles , California 90089-0242 , United States
| | - Fuyuki Shimojo
- Department of Physics , Kumamoto University , Kumamoto 860-8555 , Japan
| | - Aiichiro Nakano
- Collaboratory for Advanced Computing and Simulations, Department of Physics & Astronomy, Department of Computer Science, Department of Chemical Engineering & Materials Science, and Department of Biological Sciences , University of Southern California , Los Angeles , California 90089-0242 , United States
| | - Rajiv K Kalia
- Collaboratory for Advanced Computing and Simulations, Department of Physics & Astronomy, Department of Computer Science, Department of Chemical Engineering & Materials Science, and Department of Biological Sciences , University of Southern California , Los Angeles , California 90089-0242 , United States
| | - Priya Vashishta
- Collaboratory for Advanced Computing and Simulations, Department of Physics & Astronomy, Department of Computer Science, Department of Chemical Engineering & Materials Science, and Department of Biological Sciences , University of Southern California , Los Angeles , California 90089-0242 , United States
| | - Paulo S Branicio
- Collaboratory for Advanced Computing and Simulations, Department of Physics & Astronomy, Department of Computer Science, Department of Chemical Engineering & Materials Science, and Department of Biological Sciences , University of Southern California , Los Angeles , California 90089-0242 , United States
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17
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Ding X, Kong H, Qiao M, Hu Z, Yu M. Study on Crystallization Behaviors and Properties of F-III Fibers during Hot Drawing in Supercritical Carbon Dioxide. Polymers (Basel) 2019; 11:polym11050856. [PMID: 31083401 PMCID: PMC6572010 DOI: 10.3390/polym11050856] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 05/04/2019] [Accepted: 05/07/2019] [Indexed: 12/03/2022] Open
Abstract
In order to obtain F-III fibers with high mechanical properties, pristine F-III fibers were hot drawn at the temperature of 250 °C, pressure of 14 MPa, tension of 6 g·d−1, and different times, which were 15 min, 30 min, 45 min, 60 min, 75 min, 90 min, and 105 min, respectively, in supercritical carbon dioxide (Sc-CO2) in this article. All the samples, including the pristine and treated F-III fibers, were characterized by a mechanical performance tester, wide-angle X-ray scattering (WAXS), small-angle X-ray scattering (SAXS), and thermogravimetric analysis (TGA). The results showed that the thermal stability of F-III fibers was enhanced to some extent, and the tensile strength and modulus of F-III fibers had great changes as the extension of treatment time during hot drawing in Sc-CO2, although the treatment temperature was lower than the glass transition temperature (Tg) of F-III fibers. Accordingly, the phase fraction, orientation factor fc of the (110) crystal plane, fibril length lf, and misorientation angle Bφ of all the samples were also investigated. Fortunately, the hot drawing in Sc-CO2 was successfully applied to the preparation of F-III fibers with high mechanical properties.
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Affiliation(s)
- Xiaoma Ding
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
- Shanghai Key Laboratory of Lightweight Composite, Shanghai 201620, China.
| | - Haijuan Kong
- School of Materials Engineer, Shanghai University of Engineer Science, Shanghai 201620, China.
| | - Mengmeng Qiao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
- Shanghai Key Laboratory of Lightweight Composite, Shanghai 201620, China.
| | - Zhifeng Hu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
- Shanghai Key Laboratory of Lightweight Composite, Shanghai 201620, China.
| | - Muhuo Yu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
- Shanghai Key Laboratory of Lightweight Composite, Shanghai 201620, China.
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18
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Wu Z, Yan G, Lu J, Zhang G, Yang J. Thermal Plastic and Optical Transparent Polyimide Derived from Isophorone Diamine and Sulfhydryl Compounds. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00674] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhefu Wu
- College of Polymer Materials Science and Engineering, Sichuan University, Chengdu 610064, P. R. China
| | - Guangming Yan
- Institute of Materials Science and Technology, Analysis and Testing Center, Sichuan University, Chengdu 610064, P. R. China
| | - Jiehong Lu
- Institute of Materials Science and Technology, Analysis and Testing Center, Sichuan University, Chengdu 610064, P. R. China
| | - Gang Zhang
- Institute of Materials Science and Technology, Analysis and Testing Center, Sichuan University, Chengdu 610064, P. R. China
| | - Jie Yang
- Institute of Materials Science and Technology, Analysis and Testing Center, Sichuan University, Chengdu 610064, P. R. China
- State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu 610064, P. R. China
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19
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Ding X, Kong H, Qiao M, Hu Z, Yu M. Effect of Different Pressures on Microstructure and Mechanical Performance of F-III Fibers in Supercritical Carbon Dioxide Fluid. MATERIALS 2019; 12:ma12050690. [PMID: 30813598 PMCID: PMC6427381 DOI: 10.3390/ma12050690] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 02/21/2019] [Accepted: 02/21/2019] [Indexed: 12/05/2022]
Abstract
F-III fibers were treated at different pressures in supercritical carbon dioxide fluid and all samples including untreated and treated F-III fibers were characterized by a mechanical performance tester, wide-angle X-ray scattering and small-angle X-ray scattering. By studying the relationship between mechanical performance and microstructural changes of the samples, it was found that microstructural change was the main cause of variation in mechanical performance. Results revealed that the maximum tensile strength and modulus of F-III fibers were acquired at 14 MPa within the pressure range of 8 MPa to 16 MPa when the temperature, tension and time were 250 °C, 6 g·d−1 and 40 min, respectively. Correspondingly, the microstructures of the samples, including the phase fraction, crystal size, orientation factor, fibril radius, fibril length and misorientation angle, have been investigated. It was fortunate that the supercritical carbon dioxide fluid could be used as a medium during the hot-stretch process to improve the mechanical performance of F-III fibers, although the treatment temperature was lower than the glass transition temperature of the F-III fibers.
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Affiliation(s)
- Xiaoma Ding
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Haijuan Kong
- School of Materials Engineer, Shanghai University of Engineer Science, Shanghai 201620, China.
| | - Mengmeng Qiao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Zhifeng Hu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Muhuo Yu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
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20
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Winters J, Dehaen W, Binnemans K. Solvation structure of poly-m-phenyleneisophthalamide (PMIA) in ionic liquids. Phys Chem Chem Phys 2019; 21:4053-4062. [PMID: 30714587 DOI: 10.1039/c8cp07041e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polyaramids are a class of high-performance polymers, known for their high mechanical strength and chemical and thermal stability. Their ability to create a network of intermolecular hydrogen bonds causes them to be very poorly soluble in conventional solvents. Hazardous solvents such as N-methylpyrrolidone (NMP) and dimethylacetamide (DMA), in combination with an inorganic salt such as CaCl2, are currently used for the synthesis and processing of polyaramids. Ionic liquids are proposed as suitable greener alternatives. In this work, we studied the solubility and dissolution mechanism of the meta-oriented polyaramid poly-m-phenyleneisophthalamide (PMIA) in a wide range of ionic liquids. It was found that, similarly to cellulose, PMIA could be dissolved readily and in large amounts in ionic liquids containing a strongly coordinating anion (such as chloride, acetate and dialkylphosphate) and an imidazolium cation. Hydrogen bonding between the anion and the amide NH of PMIA is the main solvent-solute interaction. An odd-even effect in solubility occurred when altering the length of the side chains on the imidazolium cation. Furthermore, it was found that the presence of hydrogen bond donating CH moieties on the cation is a necessary condition for dissolution. The exact role of these hydrogen bond donors was investigated by FTIR and 13C NMR spectroscopy. It was found that there is no significant interaction between the hydrogen atoms of the imidazolium ring and the amide carbonyl groups. Rather, the hydrogen bond donors are needed to stabilize the solvation shell around PMIA through alternating cation-anion interactions.
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Affiliation(s)
- Jonas Winters
- KU Leuven, Department of Chemistry, Celestijnenlaan 200F, P.O. Box 2404, B-3001 Heverlee, Belgium.
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21
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Dai Y, Cheng Z, Meng C, Yuan Y, Luo L, Liu X. Dissolution of Aramid by Ionization of Byproduct HCl Promoted by Acetate. ChemistrySelect 2019. [DOI: 10.1002/slct.201801843] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yu Dai
- State key laboratory of polymer material and engineering; College of Polymer science and engineering; Sichuan University (China)
| | - Zheng Cheng
- State key laboratory of polymer material and engineering; College of Polymer science and engineering; Sichuan University (China)
| | - Chenbo Meng
- State key laboratory of polymer material and engineering; College of Polymer science and engineering; Sichuan University (China)
| | - Yihao Yuan
- State key laboratory of polymer material and engineering; College of Polymer science and engineering; Sichuan University (China)
| | - Longbo Luo
- State key laboratory of polymer material and engineering; College of Polymer science and engineering; Sichuan University (China)
| | - Xiangyang Liu
- State key laboratory of polymer material and engineering; College of Polymer science and engineering; Sichuan University (China)
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22
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Dai Y, Cheng Z, Yuan Y, Meng C, Qin J, Liu X. In Situ Complex with by-product HCl and Release Chloride Ions to Dissolve Aramid. Chemphyschem 2018; 19:2468-2471. [PMID: 29924473 DOI: 10.1002/cphc.201800468] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Indexed: 11/10/2022]
Abstract
Because of the strong hydrogen-bond interaction among macromolecular chains, the addition of chloride salts is generally needed to offer Cl- ions for the dissolution of aromatic polyamides. In this paper, poly-(benzimidazole-terephthalamide) which complexed with by-product HCl during polymerization (PABI-HCl) was prepared and imidazole compound as cosolvent was added into dimethylacetamide (DMAc) to dissolve PABI-HCl. Due to stronger affinity to protons, imidazole compound could in-situ complex with HCl of PABI-HCl and form imidazolium hydrochloride. Then imidazolium hydrochloride would ionize and produce much free Cl- ions which acted as stronger hydrogen-bond acceptor to disrupt interaction among macromolecular chains. As a result, solubility of PABI-HCl in DMAc was improved significantly in existence of small amount of imidazole compound. Moreover, DMAc-imidazole mixture was utlized for synthesis of different kinds of aramids and no precipitation was observed with progress of the reaction. So the mixture was suitable to be utlized as solvent for polymerization of aramid.
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Affiliation(s)
- Yu Dai
- State key laboratory of polymer material and engineering, College of Polymer science and engineering, Sichuan University, China
| | - Zheng Cheng
- State key laboratory of polymer material and engineering, College of Polymer science and engineering, Sichuan University, China
| | - Yihao Yuan
- State key laboratory of polymer material and engineering, College of Polymer science and engineering, Sichuan University, China
| | - Chenbo Meng
- State key laboratory of polymer material and engineering, College of Polymer science and engineering, Sichuan University, China
| | - Jiaqiang Qin
- State key laboratory of polymer material and engineering, College of Polymer science and engineering, Sichuan University, China
| | - Xiangyang Liu
- State key laboratory of polymer material and engineering, College of Polymer science and engineering, Sichuan University, China
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23
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Investigating structure property relations of poly (p-phenylene terephthalamide) fibers via reactive molecular dynamics simulations. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.09.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24
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Liu J, Kong HJ, Ma Y, Zhu S, Yu MH. Kinetics Analysis on the Polycondensation Process of Poly(p-phenylene terephthalamide): Experimental Verification and Molecular Simulation. CHINESE JOURNAL OF POLYMER SCIENCE 2018. [DOI: 10.1007/s10118-018-2024-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Feng W, Wang P, Zou G, Ren Z, Ji J. Synthesis and characterization of semiaromatic copolyamide 10T/1014 with high performance and flexibility. Des Monomers Polym 2018; 21:33-42. [PMID: 29706846 PMCID: PMC5917439 DOI: 10.1080/15685551.2018.1446278] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 02/19/2018] [Indexed: 02/07/2023] Open
Abstract
Poly (decamethylene terephthalamide) (PA10T) is a kind of engineering plastics with high strength and high modulus, but one of its disadvantages is its low elongation at break. In order to improve the flexibility of PA10T, one aliphatic comonomer with a long alkyl chain is introduced to the molecular chain of PA10T. Then long chain semiaromatic copolyamides 10T/1014 were synthesized with different contents of 1014 units by polycondensation reaction of 1,10-diaminodecane, terephthalic acid and 1,12-dodecanedicarboxylic acid in deionized water. The intrinsic viscosities of the resultant polyamides ranged from 0.90 to 1.03 dL/g were obtained. The chemical and crystal structures of the copolymers were characterized by FTIR, 1H-NMR and WAXD. These copolyamides exhibited outstanding thermal properties with melting points range of 306–295 °C and degradation temperatures range of 479–472 °C at maximum degradation rate, and also have a wider processing window than PA10T. The tensile strength of PA10T/1014 copolymers decreased gradually from 80.02 to 72.95 MPa as the content of 1014 units increasing from 5 to 20 mol %, while the elongation at break increased significantly from 57 to 150%. The moisture content of 10T/1014 copolyamides decreased with increasing the 1014 unit contents. It suggests that 10T/1014 copolyamides could be a kind of promising heat-resistant engineering thermoplastic in the future applications.
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Affiliation(s)
- Wutong Feng
- National Engineering Research Center of Engineering Plastics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P.R. China.,College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, P.R. China
| | - Pingli Wang
- National Engineering Research Center of Engineering Plastics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P.R. China
| | - Guangji Zou
- National Engineering Research Center of Engineering Plastics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P.R. China.,College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, P.R. China
| | - Zhonglai Ren
- National Engineering Research Center of Engineering Plastics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P.R. China
| | - Junhui Ji
- National Engineering Research Center of Engineering Plastics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P.R. China
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26
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High strength films from oriented, hydrogen-bonded "graphamid" 2D polymer molecular ensembles. Sci Rep 2018; 8:3708. [PMID: 29487406 PMCID: PMC5829261 DOI: 10.1038/s41598-018-22011-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 02/13/2018] [Indexed: 11/14/2022] Open
Abstract
The linear polymer poly(p-phenylene terephthalamide), better known by its tradename Kevlar, is an icon of modern materials science due to its remarkable strength, stiffness, and environmental resistance. Here, we propose a new two-dimensional (2D) polymer, “graphamid”, that closely resembles Kevlar in chemical structure, but is mechanically advantaged by virtue of its 2D structure. Using atomistic calculations, we show that graphamid comprises covalently-bonded sheets bridged by a high population of strong intermolecular hydrogen bonds. Molecular and micromechanical calculations predict that these strong intermolecular interactions allow stiff, high strength (6–8 GPa), and tough films from ensembles of finite graphamid molecules. In contrast, traditional 2D materials like graphene have weak intermolecular interactions, leading to ensembles of low strength (0.1–0.5 GPa) and brittle fracture behavior. These results suggest that hydrogen-bonded 2D polymers like graphamid would be transformative in enabling scalable, lightweight, high performance polymer films of unprecedented mechanical performance.
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27
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Positronium probes free volume to identify para- and meta-aramid fibers and correlation with mechanical strength. POLYMER 2018. [DOI: 10.1016/j.polymer.2017.11.064] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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28
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Shidara Y, Yunoki T, Miura S, Shibasaki Y, Fujimori A. Effect of the isothermal crystallization method on amorphous block copolymers of aromatic polyamides and their packing behavior in two-dimensional films for screening of potential crystallization ability. POLYM ENG SCI 2017. [DOI: 10.1002/pen.24812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yusaku Shidara
- Graduate School of Science and Engineering, Faculty of Engineering; Saitama University, 255 Shimo-okubo; Sakura-ku Saitama 338-8570 Japan
| | - Takeru Yunoki
- Department of Functional Materials Science, Faculty of Engineering; Saitama University, 255 Shimo-okubo; Sakura-ku Saitama 338-8570 Japan
| | - Shuntaro Miura
- Graduate School of Science and Engineering, Faculty of Engineering; Saitama University, 255 Shimo-okubo; Sakura-ku Saitama 338-8570 Japan
| | - Yuji Shibasaki
- Department of Chemistry, Faculty of Science & Engineering; Iwate University, 4-3-5 Ueda; Morioka Iwate 020-8552 Japan
- Department of Biological Sciences, Faculty of Science & Engineering; Iwate University, 4-3-5 Ueda; Morioka Iwate, 020-8552 Japan
| | - Atsuhiro Fujimori
- Graduate School of Science and Engineering, Faculty of Engineering; Saitama University, 255 Shimo-okubo; Sakura-ku Saitama 338-8570 Japan
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29
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Roenbeck MR, Sandoz-Rosado EJ, Cline J, Wu V, Moy P, Afshari M, Reichert D, Lustig SR, Strawhecker KE. Probing the internal structures of Kevlar® fibers and their impacts on mechanical performance. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.09.039] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Hwang EB, Yoo TJ, Yu SJ, Jeong YG. Structural features and electrical properties of carbon fibers manufactured from poly(2-cyano-1,4-phenylene terephthalamide) precursor as a new para-aramid. Macromol Res 2017. [DOI: 10.1007/s13233-017-5071-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Strain-dependent vibrational spectra and elastic modulus of poly(p-phenylene terephtalamide) from first-principles calculations. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.03.073] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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32
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Dewilde S, Winters J, Dehaen W, Binnemans K. Polymerization of PPTA in Ionic Liquid/Cosolvent Mixtures. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00579] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Sven Dewilde
- Department of Chemistry, KU Leuven, Celestijnenlaan
200F, bus 2404, B-3001 Leuven, Belgium
| | - Jonas Winters
- Department of Chemistry, KU Leuven, Celestijnenlaan
200F, bus 2404, B-3001 Leuven, Belgium
| | - Wim Dehaen
- Department of Chemistry, KU Leuven, Celestijnenlaan
200F, bus 2404, B-3001 Leuven, Belgium
| | - Koen Binnemans
- Department of Chemistry, KU Leuven, Celestijnenlaan
200F, bus 2404, B-3001 Leuven, Belgium
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33
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Mercer B, Zywicz E, Papadopoulos P. Molecular dynamics modeling of PPTA crystallite mechanical properties in the presence of defects. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.03.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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34
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Kitagawa T. Effects of Thermal History in the Fiber Production on Preferential Orientations of Molecular Planes of Rigid-Rod Polymers along the Radial Direction Normal to the Fiber Axis. J MACROMOL SCI B 2017. [DOI: 10.1080/00222348.2017.1280743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Tooru Kitagawa
- Membrane-structural Development Group, Research Center, Toyobo Co., Ltd., Otsu, Shiga, Japan
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35
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Lu Z, Dang W, Zhao Y, Wang L, Zhang M, Liu G. Toward high-performance poly(para-phenylene terephthalamide) (PPTA)-based composite paper via hot-pressing: the key role of partial fibrillation and surface activation. RSC Adv 2017. [DOI: 10.1039/c7ra00052a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hot-pressing is in favor of fibrillation and property enhancement for para-aramid fiber based composite.
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Affiliation(s)
- Zhaoqing Lu
- College of Bioresources Chemical and Materials Engineering
- Shaanxi University of Science & Technology
- Xi'an
- China
- State Key Laboratory of Pulp and Paper Engineering
| | - Wanbin Dang
- College of Bioresources Chemical and Materials Engineering
- Shaanxi University of Science & Technology
- Xi'an
- China
| | - Yongsheng Zhao
- College of Bioresources Chemical and Materials Engineering
- Shaanxi University of Science & Technology
- Xi'an
- China
| | - Lamei Wang
- College of Bioresources Chemical and Materials Engineering
- Shaanxi University of Science & Technology
- Xi'an
- China
| | - Meiyun Zhang
- College of Bioresources Chemical and Materials Engineering
- Shaanxi University of Science & Technology
- Xi'an
- China
| | - Guodong Liu
- College of Bioresources Chemical and Materials Engineering
- Shaanxi University of Science & Technology
- Xi'an
- China
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36
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Yang Y, Bu F, Liu J, Shakir I, Xu Y. Mechanochemical synthesis of two-dimensional aromatic polyamides. Chem Commun (Camb) 2017; 53:7481-7484. [DOI: 10.1039/c7cc02648j] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2D aromatic polyamides (2DAPAs) were synthesized for the first time via a facile mechanochemical route under solvent-free and room temperature conditions.
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Affiliation(s)
- Yang Yang
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Fanxing Bu
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Jingjing Liu
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Imran Shakir
- Sustainable Energy Technologies Center
- College of Engineering
- King Saud University
- Riyadh 11421
- Kingdom of Saudi Arabia
| | - Yuxi Xu
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
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37
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Ultrahigh strength and modulus copolyamide films with uniaxially cold-drawing induced molecular orientation. HIGH PERFORM POLYM 2016. [DOI: 10.1177/0954008315627377] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The tensile strength of polymer films is generally lower than 200 MPa. Copolyamide (CPA) films with ultrahigh strength (approximately 317–865 MPa) and high modulus (approximately 3.96–11.76 GPa) were obtained by uniaxial cold-drawing and heat treatment. The relationship between structures and properties in the orientation state was also investigated. The results of Fourier transform infrared (FTIR) spectroscopy indicate that hydrogen bonding interactions change a little with drawing. Wide-angle X-ray diffraction patterns show orientational stretch induces π–π ordered packing after drawing 100%. The tensile strength and modulus of the drawn CPA films are improved approximately 41%–173% and 9%–197% compared to undrawn films. Dichroic ratios obtained under polarized FTIR spectroscopy represent overall orientation factors. The decrease of dichroic ratios at about 3300 cm−1 and 1650 cm−1 and the increase of dichroic ratios at 1515 cm−1 prove that the orientation of macromolecular chains is improved along stretch direction. What’s more, the degree of orientation is further increased after heat treatment, which is the phenomenon of spontaneous orientation. The degree of spontaneous orientation increases with the increase of cold-drawing ratio. Thus, the initial orientation in cold-drawing and spontaneous orientation during heat treatment leads to ultrahigh modulus and high strength.
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38
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Luo L, Wu P, Cheng Z, Hong D, Li B, Wang X, Liu X. Direct fluorination of para-aramid fibers 1: Fluorination reaction process of PPTA fiber. J Fluor Chem 2016. [DOI: 10.1016/j.jfluchem.2016.04.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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39
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Preparation and performance of aramid nanofiber membrane for separator of lithium ion battery. J Appl Polym Sci 2016. [DOI: 10.1002/app.43623] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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40
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Zhang G, Yan GM, Ren HH, Li Y, Wang XJ, Yang J. Effects of a trans- or cis-cyclohexane unit on the thermal and rheological properties of semi-aromatic polyamides. Polym Chem 2016. [DOI: 10.1039/c5py01634g] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polyamides containing trans-formation cyclohexane unit was found to have better physical performance than that of sample with cis-formation such as mechanical, thermal and oxidation resistance properties etc.
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Affiliation(s)
- Gang Zhang
- Institute of Materials Science & Technology
- Analytical & Testing Center
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Guang-Ming Yan
- Institute of Materials Science & Technology
- Analytical & Testing Center
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Hao-Hao Ren
- Institute of Materials Science & Technology
- Analytical & Testing Center
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Yan Li
- Institute of Materials Science & Technology
- Analytical & Testing Center
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Xiao-Jun Wang
- Institute of Materials Science & Technology
- Analytical & Testing Center
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Jie Yang
- Institute of Materials Science & Technology
- Analytical & Testing Center
- Sichuan University
- Chengdu 610064
- P. R. China
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41
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Yan H, Li J, Tian W, He L, Tuo X, Qiu T. A new approach to the preparation of poly(p-phenylene terephthalamide) nanofibers. RSC Adv 2016. [DOI: 10.1039/c6ra01602b] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Poly(p-phenylene terephthalamide) nanofibers were prepared via a polymerization induced self-assembly process with the assistance of methoxy polyethylene glycol (mPEG).
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Affiliation(s)
- Hongchen Yan
- Key Laboratory of Advanced Materials (MOE)
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Jinglong Li
- Key Laboratory of Advanced Materials (MOE)
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Wenting Tian
- Key Laboratory of Advanced Materials (MOE)
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Lianyuan He
- Key Laboratory of Advanced Materials (MOE)
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Xinlin Tuo
- Key Laboratory of Advanced Materials (MOE)
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Teng Qiu
- Key Laboratory of Carbon Fiber and Functional Polymers
- Ministry of Education
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
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42
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Li X, Tian F, Zhou P, Yang C, Li X, Bian F, Wang J. In situ synchrotron small- and wide-angle X-ray study on the structural evolution of Kevlar fiber under uniaxial stretching. RSC Adv 2016. [DOI: 10.1039/c6ra17671b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In situ SAXS and WAXS study on the structural evolution and mechanism of two different Kevlar fibers during stretching.
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Affiliation(s)
- Xiaoyun Li
- Shanghai Synchrotron Radiation Facility
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai
- China
| | - Feng Tian
- Shanghai Synchrotron Radiation Facility
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai
- China
| | - Ping Zhou
- Shanghai Synchrotron Radiation Facility
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai
- China
| | - Chunming Yang
- Shanghai Synchrotron Radiation Facility
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai
- China
| | - Xiuhong Li
- Shanghai Synchrotron Radiation Facility
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai
- China
| | - Fenggang Bian
- Shanghai Synchrotron Radiation Facility
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai
- China
| | - Jie Wang
- Shanghai Synchrotron Radiation Facility
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai
- China
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43
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Luo L, Wang Y, Huang J, Hong D, Wang X, Liu X. Pre-drawing induced evolution of phase, microstructure and property in para-aramid fibres containing benzimidazole moiety. RSC Adv 2016. [DOI: 10.1039/c6ra10184d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Copoly(p-phenylene-benzimidazole-terephthalamide) (PBIA) fibre was spun by wet-spinning and drawn in a coagulating bath with different pre-drawing ratios (R).
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Affiliation(s)
- Longbo Luo
- State Key Laboratory of Polymer Material and Engineering
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Yazhe Wang
- State Key Laboratory of Polymer Material and Engineering
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Jieyang Huang
- State Key Laboratory of Polymer Material and Engineering
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Dawei Hong
- State Key Laboratory of Polymer Material and Engineering
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Xu Wang
- State Key Laboratory of Polymer Material and Engineering
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Xiangyang Liu
- State Key Laboratory of Polymer Material and Engineering
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
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44
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Yang B, Lu Z, Zhang M, Liu Y, Liu G. A ductile and highly fibrillating PPTA-pulp and its reinforcement and filling effects of PPTA-pulp on properties of paper-based materials. J Appl Polym Sci 2015. [DOI: 10.1002/app.43209] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Bin Yang
- College of Light Industry and Energy; Shaanxi University of Science & Technology; Xi'an 710021 China
| | - Zhaoqing Lu
- College of Light Industry and Energy; Shaanxi University of Science & Technology; Xi'an 710021 China
| | - Meiyun Zhang
- College of Light Industry and Energy; Shaanxi University of Science & Technology; Xi'an 710021 China
| | - Yijuan Liu
- College of Light Industry and Energy; Shaanxi University of Science & Technology; Xi'an 710021 China
| | - Guodong Liu
- College of Light Industry and Energy; Shaanxi University of Science & Technology; Xi'an 710021 China
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45
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Li Y, Zhang G, Wang X, Li ZM, Yang J. Synthesis and properties of copolymers of poly(ether ether sulfone)/semiaromatic polyamides (PEES/PA). POLYM ENG SCI 2015. [DOI: 10.1002/pen.24190] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yan Li
- Institute of Materials Science & Technology, Analytical & Testing Center, Sichuan University; Chengdu 610064 People's Republic of China
| | - Gang Zhang
- Institute of Materials Science & Technology, Analytical & Testing Center, Sichuan University; Chengdu 610064 People's Republic of China
| | - Xiaojun Wang
- Institute of Materials Science & Technology, Analytical & Testing Center, Sichuan University; Chengdu 610064 People's Republic of China
| | - Zhi-Min Li
- College of Polymer Materials Science and Engineering of Sichuan University; Chengdu 610065 People's Republic of China
| | - Jie Yang
- Institute of Materials Science & Technology, Analytical & Testing Center, Sichuan University; Chengdu 610064 People's Republic of China
- State Key Laboratory of Polymer Materials Engineering (Sichuan University); Chengdu 610065 People's Republic of China
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46
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Li K, Luo L, Huang J, Ma X, Wang H, Feng Y, Liu X. The evolution of structure and properties for copolyamide fibers–containing benzimidazole units during the decomplexation of hydrogen chloride. HIGH PERFORM POLYM 2015. [DOI: 10.1177/0954008315583704] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A diamine monomer 2-(4-aminophenyl)-5-aminobenzimidazole (PABZ) was introduced to modify poly( p-phenylene terephthalamide) by copolymerization, and corresponding aromatic copolyamide fibers were prepared by wet spinning. Thermogravimetric analysis showed that the benzimidazole units of the as-spun copolyamide fibers can complex with hydrogen chloride (HCl) to form protonated benzimidazole units, and the decomplexation takes place above 280°C. It is interesting that the crystal orientation, crystallite size, and tensile strength increase significantly during the decomplexation. Fourier transform infrared spectroscopy proved that the decomplexation leads to the release of the electron donor C=N, which can form hydrogen bonding with NH in the PABZ unit. After removing HCl, the copolyamide fibers exhibit better planarity and stronger π–π conjugation between benzimidazole and benzene rings, which is conducive to the formation of π–π stacking. Thus, we suggest that the newly formed hydrogen bonding and the enhanced π–π stacking induce the closely packing and spontaneous orientation of the macromolecular chains, which lead to the sharp improvement of the tensile strength.
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Affiliation(s)
- Ke Li
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Longbo Luo
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Jieyang Huang
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Xuhui Ma
- Keju New Materials Co., Ltd, Shenzhen, People’s Republic of China
| | - Huina Wang
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Yan Feng
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Xiangyang Liu
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan, People’s Republic of China
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47
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Zhang CL, Wan L, Gu XP, Feng LF. A Study on a Prepolymerization Process of Aromatic-Contained Polyamide Copolymers PA(66-co-6T) via One-Step Polycondensation. MACROMOL REACT ENG 2015. [DOI: 10.1002/mren.201500006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Cai-Liang Zhang
- State Key Laboratory of Chemical Engineering; College of Chemical and Biological Engineering, Zhejiang University, Zhejiang, Hangzhou 310027; China
| | - Li Wan
- State Key Laboratory of Chemical Engineering; College of Chemical and Biological Engineering, Zhejiang University, Zhejiang, Hangzhou 310027; China
| | - Xue-Ping Gu
- State Key Laboratory of Chemical Engineering; College of Chemical and Biological Engineering, Zhejiang University, Zhejiang, Hangzhou 310027; China
| | - Lian-Fang Feng
- State Key Laboratory of Chemical Engineering; College of Chemical and Biological Engineering, Zhejiang University, Zhejiang, Hangzhou 310027; China
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48
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Luo L, Zheng Y, Huang J, Li K, Wang H, Feng Y, Wang X, Liu X. High-performance copoly(benzimidazole-benzoxazole-imide) fibers: Fabrication, structure, and properties. J Appl Polym Sci 2015. [DOI: 10.1002/app.42001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Longbo Luo
- State Key Laboratory of Polymer Material and Engineering; College of Polymer Science and Engineering, Sichuan University; Chengdu 610065 People's Republic of China
| | - Yaxin Zheng
- State Key Laboratory of Polymer Material and Engineering; College of Polymer Science and Engineering, Sichuan University; Chengdu 610065 People's Republic of China
| | - Jieyang Huang
- State Key Laboratory of Polymer Material and Engineering; College of Polymer Science and Engineering, Sichuan University; Chengdu 610065 People's Republic of China
| | - Ke Li
- State Key Laboratory of Polymer Material and Engineering; College of Polymer Science and Engineering, Sichuan University; Chengdu 610065 People's Republic of China
| | - Huina Wang
- State Key Laboratory of Polymer Material and Engineering; College of Polymer Science and Engineering, Sichuan University; Chengdu 610065 People's Republic of China
| | - Yan Feng
- State Key Laboratory of Polymer Material and Engineering; College of Polymer Science and Engineering, Sichuan University; Chengdu 610065 People's Republic of China
| | - Xu Wang
- State Key Laboratory of Polymer Material and Engineering; College of Polymer Science and Engineering, Sichuan University; Chengdu 610065 People's Republic of China
| | - Xiangyang Liu
- State Key Laboratory of Polymer Material and Engineering; College of Polymer Science and Engineering, Sichuan University; Chengdu 610065 People's Republic of China
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49
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Wang PJ, Wang K, Zhang JS, Luo GS. Non-aqueous suspension polycondensation in NMP-CaCl2/paraffin system — A new approach for the preparation of poly(p-phenylene terephthalamide). CHINESE JOURNAL OF POLYMER SCIENCE 2015. [DOI: 10.1007/s10118-015-1607-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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50
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Preparation and characterization of compatible PVDF/PPTA blends by in situ polymerization for separation membrane materials. JOURNAL OF POLYMER RESEARCH 2015. [DOI: 10.1007/s10965-015-0666-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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