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1
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Choi J, Shin T, Song K, Seo YP, Seo Y. Nonisothermal Crystallization Behaviors of Structure-Modified Polyamides (Nylon 6s). ACS OMEGA 2020; 5:29325-29332. [PMID: 33225163 PMCID: PMC7676331 DOI: 10.1021/acsomega.0c04082] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 10/15/2020] [Indexed: 06/11/2023]
Abstract
The morphological development and thermal properties of different polyamides with long-chain branches without forming a network structure were characterized by differential scanning calorimetry, polarized optical microscopy, and nonisothermal crystallization kinetics. The crystallization characteristics were analyzed using the nonisothermal kinetic equation proposed by Seo. Polarized optical microscopy and the Avrami exponent show the effect of the structural changes on the molecular ordering during the crystallization and early morphological development. The Avrami exponent, n, determined from the analysis of the nonisothermal crystallization kinetics, indicates a reduced heterogeneous nucleation for the modified polyamides. Structural changes (branching) of the polyamides impede crystallization, as indicated by the shift of the crystallization peaks to lower temperatures.
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Affiliation(s)
| | | | | | | | - Yongsok Seo
- . Phone: +82-2-880-9085. Fax: +82-2-885-9671
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2
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Qi Y, Zhang C, Zhao Y, Wang D, Lei J, Li Z. Synergistic enhancement of crystallization and mechanical performance of polypropylene random copolymer by strong shear and β-nucleating agent. POLYM INT 2017. [DOI: 10.1002/pi.5368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yanxin Qi
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry; Chinese Academy of Sciences; PR China
- University of Chinese Academy of Sciences; Beijing PR China
| | - Chunbo Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry; Chinese Academy of Sciences; PR China
- Department of Polymer Materials, Advanced Materials Center; National Institute of Clean-and-Low-Carbon Energy; Beijing China
| | - Ying Zhao
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry; Chinese Academy of Sciences; PR China
| | - Dujin Wang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry; Chinese Academy of Sciences; PR China
- University of Chinese Academy of Sciences; Beijing PR China
| | - Jun Lei
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu China
| | - Zhongming Li
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu China
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Rizvi A, Andalib ZK, Park CB. Fiber-spun polypropylene/polyethylene terephthalate microfibrillar composites with enhanced tensile and rheological properties and foaming ability. POLYMER 2017. [DOI: 10.1016/j.polymer.2016.12.054] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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García-Peñas A, Cerrada ML, Gómez-Elvira JM, Pérez E. Microstructure and thermal stability in metallocene iPP-materials: 1-pentene and 1-hexene copolymers. Polym Degrad Stab 2016. [DOI: 10.1016/j.polymdegradstab.2015.12.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Xu N, Mo J, Xiao C, Han X. Structure and Properties of In-Situ Reactive Compatibilized Polypropylene/Poly (Butyl Methacrylate-Co-Hydroxyethyl Methacrylate) Blend Fibers. J MACROMOL SCI B 2015. [DOI: 10.1080/00222348.2015.1084576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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Wang Y, Chen C, Xu JZ, Lei J, Mao Y, Li ZM, Hsiao BS. Suppressing of γ-Crystal Formation in Metallocene-Based Isotactic Polypropylene during Isothermal Crystallization under Shear Flow. J Phys Chem B 2012; 116:5056-63. [DOI: 10.1021/jp3003068] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yan Wang
- College of Polymer
Science and
Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Chen Chen
- Analytical and Testing Center, Sichuan University, Chengdu 610065, P. R. China
| | - Jia-Zhuang Xu
- College of Polymer
Science and
Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Jun Lei
- College of Polymer
Science and
Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Yimin Mao
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400,
United States
| | - Zhong-Ming Li
- College of Polymer
Science and
Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Benjamin S. Hsiao
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400,
United States
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Wang Y, Pan JL, Mao Y, Li ZM, Li L, Hsiao BS. Spatial Distribution of γ-Crystals in Metallocene-Made Isotactic Polypropylene Crystallized under Combined Thermal and Flow Fields. J Phys Chem B 2010; 114:6806-16. [DOI: 10.1021/jp1002484] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yan Wang
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China, Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, and National Synchrotron Radiation Laboratory and Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Ji-Lin Pan
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China, Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, and National Synchrotron Radiation Laboratory and Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Yimin Mao
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China, Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, and National Synchrotron Radiation Laboratory and Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Zhong-Ming Li
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China, Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, and National Synchrotron Radiation Laboratory and Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Liangbin Li
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China, Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, and National Synchrotron Radiation Laboratory and Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Benjamin S. Hsiao
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China, Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, and National Synchrotron Radiation Laboratory and Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
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11
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Na B, Lv R, Xu W, Tian N, Li Z, Zhang Z, Fu Q. Enhanced crystallization of the γ-form of propylene-ethylene copolymer in its miscible blends with propylene homopolymer. POLYM INT 2009. [DOI: 10.1002/pi.2623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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Na B, Lv R, Xu W, Chen R, Zhao Z, Yi Y. Effect of nucleating duality on the formation of γ-phase in a β-nucleated isotactic polypropylene copolymer. POLYM INT 2008. [DOI: 10.1002/pi.2454] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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