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Zhou Y, Zhang J, Huang J. Dynamic Propagation Depth in Substrate-Supported Polymer Films: A Molecular Dynamics Simulation. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c02539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
Affiliation(s)
- Yun Zhou
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jin Zhang
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jianhua Huang
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
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2
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Park H, Ma BS, Kim Y, Lee D, Li S, Kim HJ, Kim TS, Kim BJ. Direct Measurement of the Thermomechanical Properties of Poly(3-hexylthiophene) Thin Films on Ionic Liquid Surfaces. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c02275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Affiliation(s)
| | | | | | | | | | - Hyeong Jun Kim
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea
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3
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Interfacial Forces in Free-Standing Layers of Melted Polyethylene, from Critical to Nanoscopic Thicknesses. Polymers (Basel) 2022; 14:polym14183865. [PMID: 36146008 PMCID: PMC9503058 DOI: 10.3390/polym14183865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/04/2022] [Accepted: 09/07/2022] [Indexed: 11/17/2022] Open
Abstract
Molecular dynamics simulations of ultrathin free-standing layers made of melted (373.15–673.15 K) polyethylene chains, which exhibit a lower melting temperature (compared to the bulk value), were carried out to investigate the dominant pressure forces that shape the conformation of chains at the interfacial and bulk liquid regions. We investigated layer thicknesses, tL, from the critical limit of mechanical stability up to lengths of tens of nm and found a normal distribution of bonds dominated by slightly stretched chains across the entire layer, even at large temperatures. In the bulk region, the contribution of bond vibrations to pressure was one order of magnitude larger than the contributions from interchain interactions, which changed from cohesive to noncohesive at larger temperatures just at a transition temperature that was found to be close to the experimentally derived onset temperature for thermal stability. The interchain interactions produced noncohesive interfacial regions at all temperatures in both directions (normal and lateral to the surface layer). Predictions for the value of the surface tension, γ, were consistent with experimental results and were independent of tL. However, the real interfacial thickness—measured from the outermost part of the interface up to the point where γ reached its maximum value—was found to be dependent on tL, located at a distance of 62 Å from the Gibbs dividing surface in the largest layer studied (1568 chains or 313,600 bins); this was ~4 times the length of the interfacial thickness measured in the density profiles.
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Wang Q, Kang L, Xu X, Zhang M, Chao A, Chen J, Han Z, Yu H, Li R, Zhao Y, Zhang D, Jiang N. Multiscale Crystalline Structure of Confined Polypeptoid Films: The Effect of Alkyl Side Chain Branching. ACS Macro Lett 2022; 11:1060-1066. [PMID: 35976225 DOI: 10.1021/acsmacrolett.2c00271] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the effect of alkyl side chain branching on melt-recrystallization of nanoconfined polypeptoid films using poly(N-octyl glycine) (PNOG) and poly(N-2-ethyl-1-hexyl glycine) (PNEHG) as model systems. Upon cooling from the isotropic melt, confined PNOG molecules recrystallize into a near-perfect orthorhombic crystal structure with the board-like molecules stacked face-to-face in the substrate-parallel direction, resulting in long-range ordered wormlike lamellae that occupy the entire film. By contrast, rod-like PNEHG molecules bearing branched N-2-ethyl-1-hexyl side chains stack into a columnar hexagonal mesophase with their backbones oriented parallel to the substrates, forming micron-sized sheaf-like superstructures under confinement, exposing large areas of empty spaces in the film. These findings highlight the effect of alkyl side chain branching on the packing motif and multiscale crystalline structure of polypeptoids under a nanoconfined geometry.
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Affiliation(s)
- Qi Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Liying Kang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiangyu Xu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Meng Zhang
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Albert Chao
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Jianxia Chen
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Zhijing Han
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Huihui Yu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Ruipeng Li
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Yixin Zhao
- Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining and Technology, Beijing 100083, China
| | - Donghui Zhang
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Naisheng Jiang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
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5
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González-Mijangos JA, Lima E, Guerra-González R, Ramírez-Zavaleta FI, Rivera JL. Critical Thickness of Free-Standing Nanothin Films Made of Melted Polyethylene Chains via Molecular Dynamics. Polymers (Basel) 2021; 13:3515. [PMID: 34685274 PMCID: PMC8538407 DOI: 10.3390/polym13203515] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/04/2021] [Accepted: 10/07/2021] [Indexed: 01/16/2023] Open
Abstract
The mechanical stability of nanothin free-standing films made of melted polyethylene chains was predicted via molecular dynamics simulations in the range of 373.15-673.15 K. The predicted critical thickness, tc, increased with the square of the temperature, T, with additional chains needed as T increased. From T = 373.15 K up to the thermal limit of stability for polyethylene, tc values were in the range of nanothin thicknesses (3.42-5.63 nm), which approximately corresponds to 44-55 chains per 100 nm2. The density at the center of the layer and the interfacial properties studied (density profiles, interfacial thickness, and radius of gyration) showed independence from the film thickness at the same T. The polyethylene layer at its tc showed a lower melting T (<373.15 K) than bulk polyethylene.
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Affiliation(s)
- José Antonio González-Mijangos
- Facultad de Ciencias Físico-Matemáticas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia 58000, Mexico; (J.A.G.-M.); (F.I.R.-Z.)
| | - Enrique Lima
- Laboratorio de Fisicoquímica y Reactividad de Superficies (LaFReS), Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de Mexico, Circuito Exterior S/N, CU, Del. Coyoacán, Ciudad de Mexico 04510, Mexico;
| | - Roberto Guerra-González
- Facultad de Ingeniería Química, Universidad Michoacana de San Nicolás de Hidalgo, Morelia 58000, Mexico;
| | - Fernando Iguazú Ramírez-Zavaleta
- Facultad de Ciencias Físico-Matemáticas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia 58000, Mexico; (J.A.G.-M.); (F.I.R.-Z.)
| | - José Luis Rivera
- Facultad de Ciencias Físico-Matemáticas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia 58000, Mexico; (J.A.G.-M.); (F.I.R.-Z.)
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6
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Nile R, Rajput H, Sims C, Jin K. Sensing the melting transition of semicrystalline polymers via a novel fluorescence technique. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Zhang R, Fall WS, Hall KW, Gehring GA, Zeng X, Ungar G. Quasi-continuous melting of model polymer monolayers prompts reinterpretation of polymer melting. Nat Commun 2021; 12:1710. [PMID: 33731691 PMCID: PMC7969604 DOI: 10.1038/s41467-021-21799-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 02/09/2021] [Indexed: 11/10/2022] Open
Abstract
Condensed matter textbooks teach us that melting cannot be continuous and indeed experience, including with polymers and other long-chain compounds, tells us that it is a strongly first-order transition. However, here we report nearly continuous melting of monolayers of ultralong n-alkane C390H782 on graphite, observed by AFM and reproduced by mean-field theory and MD simulation. On heating, the crystal-melt interface moves steadily and reversibly from chain ends inward. Remarkably, the final melting point is 80 K above that of the bulk, and equilibrium crystallinity decreases continuously from ~100% to <50% prior to final melting. We show that the similarity in melting behavior of polymers and non-polymers is coincidental. In the bulk, the intermediate melting stages of long-chain crystals are forbidden by steric overcrowding at the crystal-liquid interface. However, there is no crowding in a monolayer as chain segments can escape to the third dimension.
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Affiliation(s)
- Ruibin Zhang
- State Key Laboratory for Mechanical Behavior of Materials, Shaanxi International Research Centre for Soft Materials, Xi'an Jiaotong University, Xi'an, China.,Department of Materials Science and Engineering, University of Sheffield, Sheffield, UK.,Department of Physics, Zhejiang Sci-Tech University, Hangzhou, China
| | - William S Fall
- State Key Laboratory for Mechanical Behavior of Materials, Shaanxi International Research Centre for Soft Materials, Xi'an Jiaotong University, Xi'an, China.,Department of Physics and Astronomy, University of Sheffield, Sheffield, UK
| | - Kyle Wm Hall
- Department of Chemistry, Temple University, Philadelphia, PA, USA
| | - Gillian A Gehring
- Department of Physics and Astronomy, University of Sheffield, Sheffield, UK
| | - Xiangbing Zeng
- Department of Materials Science and Engineering, University of Sheffield, Sheffield, UK.
| | - Goran Ungar
- State Key Laboratory for Mechanical Behavior of Materials, Shaanxi International Research Centre for Soft Materials, Xi'an Jiaotong University, Xi'an, China. .,Department of Physics, Zhejiang Sci-Tech University, Hangzhou, China.
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8
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Shamloo A, Rodrigue D, Soldera A. Melting of alkane nanocrystals: towards a representation of polyethylene. MOLECULAR SIMULATION 2020. [DOI: 10.1080/08927022.2020.1797020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Azar Shamloo
- Laboratory of Physical Chemistry of Matters, Department of chemistry, Université de Sherbrooke, Sherbrooke, Canada
| | - Denis Rodrigue
- Department of chemical engineering, Université Laval, Quebec City, Canada
| | - Armand Soldera
- Laboratory of Physical Chemistry of Matters, Department of chemistry, Université de Sherbrooke, Sherbrooke, Canada
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9
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Salatto D, Koga YT, Bajaj Y, Huang Z, Yavitt BM, Meng Y, Carrillo JMY, Sumpter BG, Nykypanchuk D, Taniguchi T, Endoh MK, Koga T. Generalized Protein-Repellent Properties of Ultrathin Homopolymer Films. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Daniel Salatto
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794-2275, United States
| | - Yuto T. Koga
- Department of Food Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, New York 14853, United States
| | - Yashasvi Bajaj
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794-2275, United States
| | - Zhixing Huang
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794-2275, United States
| | - Benjamin M. Yavitt
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794-2275, United States
| | - Yizhi Meng
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794-2275, United States
| | - Jan-Michael Y. Carrillo
- Center for Nanophase Materials Sciences and Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Bobby G. Sumpter
- Center for Nanophase Materials Sciences and Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Dmytro Nykypanchuk
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Takashi Taniguchi
- Graduate School of Engineering, Department of Chemical Engineering, Kyoto University, Katsura-Campus, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Maya K. Endoh
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794-2275, United States
| | - Tadanori Koga
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794-2275, United States
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
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10
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Chen Z, Lau KKS. Suppressing Crystallinity by Nanoconfining Polymers Using Initiated Chemical Vapor Deposition. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00496] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhengtao Chen
- Department of Chemical and Biological Engineering, Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States
| | - Kenneth K. S. Lau
- Department of Chemical and Biological Engineering, Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States
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11
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Lamellar orientation in isotactic polypropylene thin films: a complement study via grazing incidence X-ray diffraction and surface/cross-sectional imaging. Polym J 2018. [DOI: 10.1038/s41428-018-0138-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Wu X, Shi S, Yu Z, Russell TP, Wang D. AFM nanomechanical mapping and nanothermal analysis reveal enhanced crystallization at the surface of a semicrystalline polymer. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.05.043] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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13
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Kelly GM, Elman JF, Jiang Z, Strzalka J, Albert JN. Thermal transitions in semi-crystalline polymer thin films studied via spectral reflectance. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.04.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Jiang N, Sen M, Zeng W, Chen Z, Cheung JM, Morimitsu Y, Endoh MK, Koga T, Fukuto M, Yuan G, Satija SK, Carrillo JMY, Sumpter BG. Structure-induced switching of interpolymer adhesion at a solid-polymer melt interface. SOFT MATTER 2018; 14:1108-1119. [PMID: 29340434 DOI: 10.1039/c7sm02279d] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Here we report a link between the interfacial structure and adhesive property of homopolymer chains physically adsorbed (i.e., via physisorption) onto solids. Polyethylene oxide (PEO) was used as a model and two different chain conformations of the adsorbed polymer were created on silicon substrates via the well-established Guiselin's approach: "flattened chains" which lie flat on the solid and are densely packed, and "loosely adsorbed polymer chains" which form bridges jointing up nearby empty sites on the solid surface and cover the flattened chains. We investigated the adhesion properties of the two different adsorbed chains using a custom-built adhesion testing device. Bilayers of a thick PEO overlayer on top of the flattened chains or loosely adsorbed chains were subjected to the adhesion test. The results revealed that the flattened chains do not show any adhesion even with the chemically identical free polymer on top, while the loosely adsorbed chains exhibit adhesion. Neutron reflectivity experiments corroborated that the difference in the interfacial adhesion is not attributed to the interfacial brodening at the free polymer-adsorbed polymer interface. Instead, coarse-grained molecular dynamics simulation results suggest that the tail parts of the loosely adsorbed chains act as "connector molecules", bridging the free chains and substrate surface and improving the interfacial adhesion. These findings not only shed light on the structure-property relationship at the interface, but also provide a novel approach for developing sticking/anti-sticking technologies through precise control of the interfacial polymer nanostructures.
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Affiliation(s)
- Naisheng Jiang
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794-2275, USA.
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15
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Qiao H, Guo T, Zheng Y, Zhao L, Sun Y, Liu Y, Xie Y. A novel microporous oxidized bacterial cellulose/arginine composite and its effect on behavior of fibroblast/endothelial cell. Carbohydr Polym 2017; 184:323-332. [PMID: 29352926 DOI: 10.1016/j.carbpol.2017.12.026] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 12/03/2017] [Accepted: 12/12/2017] [Indexed: 12/20/2022]
Abstract
The bacterial cellulose (BC) has been reported widely. Although there are many methods to modify BC, such as the oxidized BC, which is biodegradable and can be used as wound dressing. However, the nanostructure of BC makes it difficult to be oxidized. Importantly, high oxidation degree makes the content of aldehyde high, which make the cell biocompatibility poor. Herein, we fabricated a novel bio-composite based on microporous oxidized BC (MOBC) and in-situ grafted with Arg. The micropores can increase the contact area between BC and oxidizing agent and the reaction between MOBC and Arg, which will enhance the biocompatibility. The roughness and surface energy of MOBC/68.68%Arg are 1.5 and 1.16 times than that of BC respectively. We applied a microfluidic chip to evaluate the cell migration. Comparing with BC, MOBC/Arg promoted proliferation, migration and expression of Collagen-I of fibroblasts and endothelial cells. It prospects the MOBC/Arg can be used as wound dressing.
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Affiliation(s)
- Hui Qiao
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, PR China
| | - Tengfei Guo
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Bioengineering and Sensing Technology, University of Science & Technology Beijing, Beijing 100083, PR China
| | - Yudong Zheng
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, PR China.
| | - Liang Zhao
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Bioengineering and Sensing Technology, University of Science & Technology Beijing, Beijing 100083, PR China.
| | - Yi Sun
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, PR China
| | - Yang Liu
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Bioengineering and Sensing Technology, University of Science & Technology Beijing, Beijing 100083, PR China
| | - Yajie Xie
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, PR China
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Wang H, Li M, Yin Z, Zhang T, Chen X, Zhou D, Zhu J, Xu W, Cui H, Song H. Remarkable Enhancement of Upconversion Luminescence on Cap-Ag/PMMA Ordered Platform and Trademark Anticounterfeiting. ACS APPLIED MATERIALS & INTERFACES 2017; 9:37128-37135. [PMID: 28967250 DOI: 10.1021/acsami.7b10015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
High brightness of upconversion luminescence (UCL) for a thinner layer of UC nanoparticles is significant for routine applications of effective trademark anticounterfeiting technology. In this work, efficient UCL of NaYF4:Yb3+,Er3+/Tm3+ was realized by combining a Ta2O5 dielectric layer on the cyclical island silver films supported by poly(methyl methacrylate) opal photonic crystals (PCs). The synergistic modulation of localized surface plasmon resonance and PC effect results in a significant improvement of the local electromagnetic field and an optimum UC enhancement of 145 folds. Furthermore, colorful pattern nanoprinting has been applied to this composite and used for trademark anticounterfeiting. The combination of angle-dependent PC effect and infrared-to-visible UCL represents a more advanced anticounterfeiting technique.
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Affiliation(s)
- He Wang
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, and ‡College of Physics, Jilin University , 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Mengchao Li
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, and ‡College of Physics, Jilin University , 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Ze Yin
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, and ‡College of Physics, Jilin University , 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Tianxiang Zhang
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, and ‡College of Physics, Jilin University , 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Xu Chen
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, and ‡College of Physics, Jilin University , 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Donglei Zhou
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, and ‡College of Physics, Jilin University , 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Jinyang Zhu
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, and ‡College of Physics, Jilin University , 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Wen Xu
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, and ‡College of Physics, Jilin University , 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Haining Cui
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, and ‡College of Physics, Jilin University , 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Hongwei Song
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, and ‡College of Physics, Jilin University , 2699 Qianjin Street, Changchun 130012, P. R. China
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18
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Crystalline and Spherulitic Morphology of Polymers Crystallized in Confined Systems. CRYSTALS 2017. [DOI: 10.3390/cryst7050147] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Due to the effects of microphase separation and physical dimensions, confinement widely exists in the multi-component polymer systems (e.g., polymer blends, copolymers) and the polymers having nanoscale dimensions, such as thin films and nanofibers. Semicrystalline polymers usually show different crystallization kinetics, crystalline structure and morphology from the bulk when they are confined in the nanoscale environments; this may dramatically influence the physical performances of the resulting materials. Therefore, investigations on the crystalline and spherulitic morphology of semicrystalline polymers in confined systems are essential from both scientific and technological viewpoints; significant progresses have been achieved in this field in recent years. In this article, we will review the recent research progresses on the crystalline and spherulitic morphology of polymers crystallized in the nanoscale confined environments. According to the types of confined systems, crystalline, spherulitic morphology and morphological evolution of semicrystalline polymers in the ultrathin films, miscible polymer blends and block copolymers will be summarized and reviewed.
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19
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Ultrathin film crystallization of poly(ε-caprolactone) in blends containing styrene-isoprene block copolymers: The nano-rose morphology. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.04.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Madkour S, Szymoniak P, Heidari M, von Klitzing R, Schönhals A. Unveiling the Dynamics of Self-Assembled Layers of Thin Films of Poly(vinyl methyl ether) (PVME) by Nanosized Relaxation Spectroscopy. ACS APPLIED MATERIALS & INTERFACES 2017; 9:7535-7546. [PMID: 28155271 DOI: 10.1021/acsami.6b14404] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A combination of nanosized dielectric relaxation (BDS) and thermal spectroscopy (SHS) was utilized to characterize the dynamics of thin films of poly(vinyl methyl ether) (PVME) (thicknesses: 7-160 nm). For the BDS measurements, a recently designed nanostructured electrode system is employed. A thin film is spin-coated on an ultraflat highly conductive silicon wafer serving as the bottom electrode. As top electrode, a highly conductive wafer with nonconducting nanostructured SiO2 nanospacers with heights of 35 or 70 nm is assembled on the bottom electrode. This procedure results in thin supported films with a free polymer/air interface. The BDS measurements show two relaxation processes, which are analyzed unambiguously for thicknesses smaller than 50 nm. The relaxation rates of both processes have different temperature dependencies. One process coincides in its position and temperature dependence with the glassy dynamics of bulk PVME and is ascribed to the dynamic glass transition of a bulk-like layer in the middle of the film. The relaxation rates were found to be thickness independent as confirmed by SHS. Unexpectedly, the relaxation rates of the second process obey an Arrhenius-like temperature dependence. This process was not observed by SHS and was related to the constrained fluctuations in a layer, which is irreversibly adsorbed at the substrate with a heterogeneous structure. Its molecular fluctuations undergo a confinement effect resulting in the localization of the segmental dynamics. To our knowledge, this is the first report on the molecular dynamics of an adsorbed layer in thin films.
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Affiliation(s)
- Sherif Madkour
- Bundesanstalt für Materialforschung und Prüfung (BAM) , Unter den Eichen 87, 12205 Berlin, Germany
| | - Paulina Szymoniak
- Bundesanstalt für Materialforschung und Prüfung (BAM) , Unter den Eichen 87, 12205 Berlin, Germany
| | - Mojdeh Heidari
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin , Straße des 17, Juni 124, 10623 Berlin, Germany
| | - Regine von Klitzing
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin , Straße des 17, Juni 124, 10623 Berlin, Germany
| | - Andreas Schönhals
- Bundesanstalt für Materialforschung und Prüfung (BAM) , Unter den Eichen 87, 12205 Berlin, Germany
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22
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Control of morphology and lamellae orientations in thin poly (ε-caprolactone) films by blending with different molar mass of polystyrene. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.01.018] [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]
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23
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Napolitano S, Glynos E, Tito NB. Glass transition of polymers in bulk, confined geometries, and near interfaces. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2017; 80:036602. [PMID: 28134134 DOI: 10.1088/1361-6633/aa5284] [Citation(s) in RCA: 244] [Impact Index Per Article: 34.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
When cooled or pressurized, polymer melts exhibit a tremendous reduction in molecular mobility. If the process is performed at a constant rate, the structural relaxation time of the liquid eventually exceeds the time allowed for equilibration. This brings the system out of equilibrium, and the liquid is operationally defined as a glass-a solid lacking long-range order. Despite almost 100 years of research on the (liquid/)glass transition, it is not yet clear which molecular mechanisms are responsible for the unique slow-down in molecular dynamics. In this review, we first introduce the reader to experimental methodologies, theories, and simulations of glassy polymer dynamics and vitrification. We then analyse the impact of connectivity, structure, and chain environment on molecular motion at the length scale of a few monomers, as well as how macromolecular architecture affects the glass transition of non-linear polymers. We then discuss a revised picture of nanoconfinement, going beyond a simple picture based on interfacial interactions and surface/volume ratio. Analysis of a large body of experimental evidence, results from molecular simulations, and predictions from theory supports, instead, a more complex framework where other parameters are relevant. We focus discussion specifically on local order, free volume, irreversible chain adsorption, the Debye-Waller factor of confined and confining media, chain rigidity, and the absolute value of the vitrification temperature. We end by highlighting the molecular origin of distributions in relaxation times and glass transition temperatures which exceed, by far, the size of a chain. Fast relaxation modes, almost universally present at the free surface between polymer and air, are also remarked upon. These modes relax at rates far larger than those characteristic of glassy dynamics in bulk. We speculate on how these may be a signature of unique relaxation processes occurring in confined or heterogeneous polymeric systems.
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Affiliation(s)
- Simone Napolitano
- Laboratory of Polymer and Soft Matter Dynamics, Faculté des Sciences, Université Libre de Bruxelles (ULB), Boulevard du Triomphe, 1050 Brussels, Belgium
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24
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Cha AN, Lee SA, Bae S, Lee SH, Lee DS, Wang G, Kim TW. An All-Organic Composite System for Resistive Change Memory via the Self-Assembly of Plastic-Crystalline Molecules. ACS APPLIED MATERIALS & INTERFACES 2017; 9:2730-2738. [PMID: 28033464 DOI: 10.1021/acsami.6b13604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
An all-organic composite system was introduced as an active component for organic resistive memory applications. The active layer was prepared by mixing a highly polar plastic-crystalline organic molecule (succinonitrile, SN) into an insulating polymer (poly(methyl methacrylate), PMMA). As increasing concentrations of SN from 0 to 3.0 wt % were added to solutions of different concentrations of PMMA, we observed distinguishable microscopic surface structures on blended films of SN and PMMA at certain concentrations after the spin-casting process. The structures were organic dormant volcanos composed of micron-scale PMMA craters and disk type SN lava. Atomic force microscopy (AFM), cross-sectional transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy dispersive X-ray spectrometer (EDX) analysis showed that these structures were located in the middle of the film. Self-assembly of the plastic-crystalline molecules resulted in the phase separation of the SN:PMMA mixture during solvent evaporation. The organic craters remained at the surface after the spin-casting process, indicative of the formation of an all-organic composite film. Because one organic crater contains one SN disk, our system has a coplanar monolayer disk composite system, indicative of the simplest composite type of organic memory system. Current-voltage (I-V) characteristics of the composite films with organic craters revealed that our all-organic composite system showed unipolar type resistive switching behavior. From logarithmic I-V characteristics, we found that the current flow was governed by space charge limited current (SCLC). From these results, we believe that a plastic-crystalline molecule-polymer composite system is one of the most reliable ways to develop organic composite systems as potential candidates for the active components of organic resistive memory applications.
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Affiliation(s)
- An-Na Cha
- Applied Quantum Composites Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology , Jeollabuk-do 55324, Republic of Korea
| | - Sang-A Lee
- Applied Quantum Composites Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology , Jeollabuk-do 55324, Republic of Korea
- Department of Polymer-Nano Science and Technology, Chonbuk National University , Jeonju 561-756, Republic of Korea
| | - Sukang Bae
- Applied Quantum Composites Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology , Jeollabuk-do 55324, Republic of Korea
| | - Sang Hyun Lee
- Applied Quantum Composites Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology , Jeollabuk-do 55324, Republic of Korea
| | - Dong Su Lee
- Applied Quantum Composites Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology , Jeollabuk-do 55324, Republic of Korea
| | - Gunuk Wang
- KU-KIST Graduate School of Converging Science and Technology, Korea University , Seoul 136-701, Republic of Korea
| | - Tae-Wook Kim
- Applied Quantum Composites Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology , Jeollabuk-do 55324, Republic of Korea
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25
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Gulde M, Rissanou AN, Harmandaris V, Müller M, Schäfer S, Ropers C. Dynamics and Structure of Monolayer Polymer Crystallites on Graphene. NANO LETTERS 2016; 16:6994-7000. [PMID: 27786488 DOI: 10.1021/acs.nanolett.6b03079] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Graphene-based nanostructured systems and van der Waals heterostructures comprise a material class of growing technological and scientific importance. Joining materials with vastly different properties, polymer/graphene heterosystems promise diverse applications in surface and nanotechnology, including photovoltaics or nanotribology. Fundamentally, molecular adsorbates are prototypical systems to study confinement-induced phase transitions exhibiting intricate dynamics, which require a comprehensive understanding of the dynamical and static properties on molecular time and length scales. Here, we investigate the dynamics and the structure of a single polyethylene chain on free-standing graphene by means of molecular dynamics simulations. In equilibrium, the adsorbed polymer is orientationally linked to the graphene as two-dimensional folded-chain crystallite or at elevated temperatures as a floating solid. The associated superstructure can be reversibly melted on a picosecond time scale upon quasi-instantaneous substrate heating, involving ultrafast heterogeneous melting via a transient floating phase. Our findings elucidate time-resolved molecular-scale ordering and disordering phenomena in individual polymers interacting with solids, yielding complementary information to collective friction and viscosity, and linking to recent experimental observables from ultrafast electron diffraction. We anticipate that the approach will help in resolving nonequilibrium phenomena of hybrid polymeric systems over a broad range of time and length scales.
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Affiliation(s)
- Max Gulde
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen , 37077, Göttingen, Germany
| | - Anastassia N Rissanou
- Institute of Applied and Computational Mathematics, Foundation for Research and Technology Hellas , 71110 Heraklion, Crete, Greece
| | - Vagelis Harmandaris
- Institute of Applied and Computational Mathematics, Foundation for Research and Technology Hellas , 71110 Heraklion, Crete, Greece
- Department of Mathematics and Applied Mathematics, University of Crete , 71409, Heraklion, Crete, Greece
| | - Marcus Müller
- Institute for Theoretical Physics, University of Göttingen , 37077, Göttingen, Germany
| | - Sascha Schäfer
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen , 37077, Göttingen, Germany
| | - Claus Ropers
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen , 37077, Göttingen, Germany
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26
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Gholipour B, Bastock P, Cui L, Craig C, Khan K, Hewak DW, Soci C. Lithography Assisted Fiber-Drawing Nanomanufacturing. Sci Rep 2016; 6:35409. [PMID: 27739543 PMCID: PMC5064402 DOI: 10.1038/srep35409] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Accepted: 09/27/2016] [Indexed: 01/10/2023] Open
Abstract
We present a high-throughput and scalable technique for the production of metal nanowires embedded in glass fibres by taking advantage of thin film properties and patterning techniques commonly used in planar microfabrication. This hybrid process enables the fabrication of single nanowires and nanowire arrays encased in a preform material within a single fibre draw, providing an alternative to costly and time-consuming iterative fibre drawing. This method allows the combination of materials with different thermal properties to create functional optoelectronic nanostructures. As a proof of principle of the potential of this technique, centimetre long gold nanowires (bulk Tm = 1064 °C) embedded in silicate glass fibres (Tg = 567 °C) were drawn in a single step with high aspect ratios (>104); such nanowires can be released from the glass matrix and show relatively high electrical conductivity. Overall, this fabrication method could enable mass manufacturing of metallic nanowires for plasmonics and nonlinear optics applications, as well as the integration of functional multimaterial structures for completely fiberised optoelectronic devices.
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Affiliation(s)
- Behrad Gholipour
- Centre for Disruptive Photonic Technologies, Nanyang Technological University, 637371, Singapore
| | - Paul Bastock
- Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
| | - Long Cui
- Centre for Disruptive Photonic Technologies, Nanyang Technological University, 637371, Singapore
| | - Christopher Craig
- Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
| | - Khouler Khan
- Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
| | - Daniel W Hewak
- Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
| | - Cesare Soci
- Centre for Disruptive Photonic Technologies, Nanyang Technological University, 637371, Singapore
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27
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Jeong H, Shepard KB, Purdum GE, Guo Y, Loo YL, Arnold CB, Priestley RD. Additive Growth and Crystallization of Polymer Films. Macromolecules 2016. [DOI: 10.1021/acs.macromol.5b02675] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hyuncheol Jeong
- Department
of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544 United States
| | - Kimberly B. Shepard
- Department
of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544 United States
| | - Geoffrey E. Purdum
- Department
of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544 United States
| | - Yunlong Guo
- Department
of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544 United States
| | - Yueh-Lin Loo
- Department
of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544 United States
- Princeton
Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544 United States
| | - Craig B. Arnold
- Princeton
Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544 United States
- Mechanical
and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544 United States
| | - Rodney D. Priestley
- Department
of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544 United States
- Princeton
Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544 United States
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28
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Chai L, Liu X, Sun X, Li L, Yan S. In situ observation of the melting behaviour of PEO single crystals on a PVPh substrate by AFM. Polym Chem 2016. [DOI: 10.1039/c5py02037a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
PVPh sublayer thickness dependent melting of PEO single crystals.
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Affiliation(s)
- Liguo Chai
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing (100029)
- China
| | - Xiao Liu
- College of Chemistry
- Beijing Normal University
- Beijing (100875)
- China
| | - Xiaoli Sun
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing (100029)
- China
| | - Lin Li
- College of Chemistry
- Beijing Normal University
- Beijing (100875)
- China
| | - Shouke Yan
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing (100029)
- China
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29
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Kumaki J. Observation of polymer chain structures in two-dimensional films by atomic force microscopy. Polym J 2015. [DOI: 10.1038/pj.2015.67] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Spièce J, Martínez-Tong DE, Sferrazza M, Nogales A, Napolitano S. Are polymers glassier upon confinement? SOFT MATTER 2015; 11:6179-6186. [PMID: 26086889 DOI: 10.1039/c5sm01229e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Glass forming systems are characterized by a stability against crystallization upon heating and by the easiness with which their liquid phase can be transformed into a solid lacking of long-range order upon cooling (glass forming ability). Here, we report the thickness dependence of the thermal phase transition temperatures of poly(l-lactide acid) thin films supported onto solid substrates. The determination of the glass transition, cold crystallization and melting temperatures down to a thickness of 6 nm, permitted us to build up parameters describing glass stability and glass forming ability. We observed a strong influence of the film thickness on the latter, while the former is not affected by 1D confinement. Further experiments permitted us to highlight key structural morphology features giving insights to our ellipsometric results via a physical picture based on the changes in the free volume content in proximity of the supporting interfaces.
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Affiliation(s)
- Jean Spièce
- Laboratory of Polymer and Soft Matter Dynamics, Faculté des Sciences, Université Libre de Bruxelles (ULB), Boulevard du Triomphe, 1050 Bruxelles, Belgium.
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31
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Woo EM, Lugito G, Tsai JH. Effects of top confinement and diluents on morphology in crystallization of poly(l-lactic acid) interacting with poly(ethylene oxide). ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23756] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Eamor M. Woo
- Department of Chemical Engineering; National Cheng Kung University; Tainan 701 Taiwan
| | - Graecia Lugito
- Department of Chemical Engineering; National Cheng Kung University; Tainan 701 Taiwan
| | - Jia-Hsuan Tsai
- Department of Chemical Engineering; National Cheng Kung University; Tainan 701 Taiwan
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32
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Zhang B, Chen J, Zhang H, Baier MC, Mecking S, Reiter R, Mülhaupt R, Reiter G. Annealing-induced periodic patterns in solution grown polymer single crystals. RSC Adv 2015. [DOI: 10.1039/c4ra10563j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Faceted polymer single crystals have been transformed into periodically branched patterns by applying a slow annealing procedure.
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Affiliation(s)
- Bin Zhang
- Institute of Physics
- University of Freiburg
- 79104 Freiburg
- Germany
- Hermann Staudinger Graduate School
| | - Jingbo Chen
- School of Materials Science & Engineering
- Zhengzhou University
- Zhengzhou 450002
- People's Republic of China
| | - Hui Zhang
- Institute of Physics
- University of Freiburg
- 79104 Freiburg
- Germany
| | - Moritz C. Baier
- Chair of Chemical Materials Science
- Department of Chemistry
- University of Konstanz
- 78464 Konstanz
- Germany
| | - Stefan Mecking
- Chair of Chemical Materials Science
- Department of Chemistry
- University of Konstanz
- 78464 Konstanz
- Germany
| | - Renate Reiter
- Institute of Physics
- University of Freiburg
- 79104 Freiburg
- Germany
- Freiburg Materials Research Centre
| | - Rolf Mülhaupt
- Institute of Macromolecular Chemistry
- University of Freiburg
- 79104 Freiburg
- Germany
- Freiburg Materials Research Centre
| | - Günter Reiter
- Institute of Physics
- University of Freiburg
- 79104 Freiburg
- Germany
- Freiburg Materials Research Centre
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33
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Zhou J, Gan H, Ren Z, Li H, Zhang J, Sun X, Yan S. The effect of poly(vinyl phenol) sublayer on the crystallization and melting behavior of poly(3-hydroxybutyrate) via hydrogen bonds. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.09.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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Asada M, Jiang N, Sendogdular L, Sokolov J, Endoh MK, Koga T, Fukuto M, Yang L, Akgun B, Dimitriou M, Satija S. Melt crystallization/dewetting of ultrathin PEO films via carbon dioxide annealing: the effects of polymer adsorbed layers. SOFT MATTER 2014; 10:6392-6403. [PMID: 24930998 DOI: 10.1039/c4sm00683f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The effects of CO2 annealing on the melting and subsequent melt crystallization processes of spin-cast poly(ethylene oxide) (PEO) ultrathin films (20-100 nm in thickness) prepared on Si substrates were investigated. By using in situ neutron reflectivity, we found that all the PEO thin films show melting at a pressure as low as P = 2.9 MPa and at T = 48 °C which is below the bulk melting temperature (Tm). The films were then subjected to quick depressurization to atmospheric pressure, resulting in the non-equilibrium swollen state, and the melt crystallization (and/or dewetting) process was carried out in air via subsequent annealing at given temperatures below Tm. Detailed structural characterization using grazing incidence X-ray diffraction, atomic force microscopy, and polarized optical microscopy revealed two unique aspects of the CO2-treated PEO films: (i) a flat-on lamellar orientation, where the molecular chains stand normal to the film surface, is formed within the entire film regardless of the original film thickness and the annealing temperature; and (ii) the dewetting kinetics for the 20 nm thick film is much slower than that for the thicker films. The key to these phenomena is the formation of irreversibly adsorbed layers on the substrates during the CO2 annealing: the limited plasticization effect of CO2 at the polymer-substrate interface promotes polymer adsorption rather than melting. Here we explain the mechanisms of the melt crystallization and dewetting processes where the adsorbed layers play vital roles.
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Affiliation(s)
- Mitsunori Asada
- Department of Materials Science and Engineering, Stony Brook University, Stony Brook, New York 11794-2275, USA.
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35
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Controlling of crystallite orientation for poly(ethylene oxide) thin films with cellulose single nano-fibers. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.06.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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36
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Zhong LW, Ren XK, Yang S, Chen EQ, Sun CX, Stroeks A, Yang TY. Lamellar orientation of polyamide 6 thin film crystallization on solid substrates. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.06.031] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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37
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Thickness-dependent orientation structure in poly(ethylene oxide) multi-layer crystals. CHINESE JOURNAL OF POLYMER SCIENCE 2014. [DOI: 10.1007/s10118-014-1504-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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38
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Jiang X, Liu X, Liao Q, Wang X, Yan DD, Huo H, Li L, Zhou JJ. Probing interfacial properties using a poly(ethylene oxide) single crystal. SOFT MATTER 2014; 10:3238-3244. [PMID: 24718789 DOI: 10.1039/c3sm52975d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Poly(ethylene oxide) (PEO) single crystals were grown from dilute solution using a self-seeding method. The PEO single crystals with uniform dimensions, homogeneous chemical and physical properties were used as a simplified ultrathin film system to probe the interfacial properties of different substrates. In situ studying the annealing and melting behavior of PEO single crystals on the PAA, amorphous PEO and PVA substrates were carried out using an atomic force microscope (AFM) equipped with a hot stage. The interaction force between the PEO modified probe and various substrates was measured at different temperatures, and the universal dependence of the interaction force between the probe and polymer substrate on the temperature was demonstrated. The wetting and dewetting behavior of PEO melt on the PAA and amorphous PEO and PVA substrates were observed and the spreading coefficient (S) was proposed to prejudge the spreading behavior of a polymer ultra-thin film on a solid substrate according to the interaction force. Different melting points were found and the initial melting of the PEO single crystals occurred at 51, 54 and 61 °C on the PAA, PEO and PVA substrates, respectively. How the interfacial energy affects the melting point of single crystals was demonstrated, and the theoretical prediction agrees well with the experimental results.
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Affiliation(s)
- Xi Jiang
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, 100875, China.
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39
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XAFS Applications on Polymers and Related Materials. ACTA POLYM SIN 2014. [DOI: 10.3724/sp.j.1105.2014.13303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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40
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Jiang N, Shang J, Di X, Endoh MK, Koga T. Formation Mechanism of High-Density, Flattened Polymer Nanolayers Adsorbed on Planar Solids. Macromolecules 2014. [DOI: 10.1021/ma5003485] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Naisheng Jiang
- Department
of Materials Science and Engineering, Stony Brook University, Stony
Brook, New York 11794-2275, United States
| | - Jun Shang
- Department
of Materials Science and Engineering, Stony Brook University, Stony
Brook, New York 11794-2275, United States
| | - Xiaoyu Di
- Department
of Materials Science and Engineering, Stony Brook University, Stony
Brook, New York 11794-2275, United States
| | - Maya K. Endoh
- Department
of Materials Science and Engineering, Stony Brook University, Stony
Brook, New York 11794-2275, United States
| | - Tadanori Koga
- Department
of Materials Science and Engineering, Stony Brook University, Stony
Brook, New York 11794-2275, United States
- Chemical
and Molecular Engineering Program, Stony Brook University, Stony
Brook, New York 11794-2275, United States
- Department
of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
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41
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Kim SA, Archer LA. Hierarchical Structure in Semicrystalline Polymers Tethered to Nanospheres. Macromolecules 2014. [DOI: 10.1021/ma4019922] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Sung A Kim
- School of Chemical and Biomolecular
Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Lynden A. Archer
- School of Chemical and Biomolecular
Engineering, Cornell University, Ithaca, New York 14853, United States
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42
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Li Q, Zhou J, Chai L, Memon J, Ren Z, Li H, Sun X, Yan S. The effect of the poly(vinyl phenol) sublayer on the melting behavior of poly(butylene adipate) crystals. Polym Chem 2014. [DOI: 10.1039/c4py00119b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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43
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Structures and Polymorphic Transitions of Triacylglycerols, SOS and POS Thin Films: A Study on Temperature Dependence. J AM OIL CHEM SOC 2013. [DOI: 10.1007/s11746-013-2290-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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44
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Müller C, Andersson LM, Peña-Rodríguez O, Garriga M, Inganäs O, Campoy-Quiles M. Determination of Thermal Transition Depth Profiles in Polymer Semiconductor Films with Ellipsometry. Macromolecules 2013. [DOI: 10.1021/ma400871u] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christian Müller
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Esfera UAB,
Bellaterra 08193, Spain
- Biomolecular and Organic Electronics, Department of Physics, Chemistry & Biology, Linköping University, 58183 Linköping, Sweden
- Department of Chemical and Biological
Engineering/Polymer Technology, Chalmers University of Technology, 41296 Göteborg, Sweden
| | - L. Mattias Andersson
- Biomolecular and Organic Electronics, Department of Physics, Chemistry & Biology, Linköping University, 58183 Linköping, Sweden
| | - Ovidio Peña-Rodríguez
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Esfera UAB,
Bellaterra 08193, Spain
| | - Miquel Garriga
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Esfera UAB,
Bellaterra 08193, Spain
| | - Olle Inganäs
- Biomolecular and Organic Electronics, Department of Physics, Chemistry & Biology, Linköping University, 58183 Linköping, Sweden
| | - Mariano Campoy-Quiles
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Esfera UAB,
Bellaterra 08193, Spain
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Osichow A, Rabe C, Vogtt K, Narayanan T, Harnau L, Drechsler M, Ballauff M, Mecking S. Ideal polyethylene nanocrystals. J Am Chem Soc 2013; 135:11645-50. [PMID: 23855756 DOI: 10.1021/ja4052334] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The water-soluble catalyst precursor [[(2,4,6-(3,5-(CF3)2C6H3)3-C6H2)-N═C(H)-(3-(9-anthryl)-2-O-C6H3)-κ(2)-N,O]Ni(CH3)(TPPTS)] (TPPTS = tri(sodiumphenylsulfonate)phosphine) polymerizes ethylene to aqueous dispersions of highly ordered nanoscale crystals (crystallinity χ(DSC) ≥ 90%) of strictly linear polyethylene (<0.7 methyl-branches/1000 carbon atoms, Mn = 4.2 × 10(5) g mol(-1)). SAXS in combination with cryo-TEM confirms this unusually high degree of order (χ(SAXS) = 82%) and shows the nanoparticles to possess a very thin amorphous layer on the crystalline lamella, just sufficient to accommodate a loop, but likely no entanglements. This ideal chain-folded structure is corroborated by annealing studies on the aqueous-dispersed nanoparticles, which show that the chain can move through the crystal as evidenced by lamella thickening without disturbing the crystalline order as concluded from an unaltered low thickness of the amorphous layers. These ideal chain-folded polyethylene nanocrystals arise from the crystallization in the confined environment of a nanoparticle and a deposition of the growing polymer chain on the crystal growth front as the chain is formed by the catalyst.
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Affiliation(s)
- Anna Osichow
- Chair of Chemical Materials Science, Department of Chemistry, University of Konstanz, Universitätsstr. 10, D-78457 Konstanz, Germany
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Takanashi Y, Kumaki J. Significant Melting Point Depression of Two-Dimensional Folded-Chain Crystals of Isotactic Poly(methyl methacrylate)s Observed by High-Resolution In Situ Atomic Force Microscopy. J Phys Chem B 2013; 117:5594-605. [DOI: 10.1021/jp401284t] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuma Takanashi
- Department of Polymer Science and Engineering, Graduate
School of Science and Engineering, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
| | - Jiro Kumaki
- Department of Polymer Science and Engineering, Graduate
School of Science and Engineering, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
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Pandit P, Gupta A, Kumar D, Banerjee M, Bernstorff S. Effect of confinement on melting behavior of cadmium arachidate Langmuir-Blodgett multilayer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:3950-3956. [PMID: 23432368 DOI: 10.1021/la304463q] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The effect of confinement between two metallic layers on the melting behavior of a 13 monolayer cadmium arachidate (CdA) Langmuir-Blodgett (LB) multilayer has been studied. Temperature dependent diffraction measurements provide information about structural changes occurring in the film plane as well as in the out-of-plane direction. X-ray standing waves have been used to achieve depth selectivity in diffraction measurements. It is found that the difference in melting behavior of the surface and the bulk, which is observed in the film with free surface, disappears in the case of confined films; while the free surface transforms to hexaticlike phase via an intermediate smectic phase, confinement results in disappearance of this phase, and the sequence of transformations in the bulk and the interfacial regions becomes identical. Some anisotropy between (01 + 11¯) and (10) directions remains, with coherence along (10) direction decreasing at a faster rate. The confinement between metallic layers also significantly reduces the tilting of the chains observed at higher temperature. Further, both in the case of film with free surface and confined films, melting at the surface/interface occurs at a lower temperature as compared to the bulk.
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Temperature-driven surface morphology evolution of poly(3-hydroxybutyrate) single layer and poly(3-hydroxybutyrate)/poly(vinyl phenol) bilayer on Si wafers. CHINESE JOURNAL OF POLYMER SCIENCE 2013. [DOI: 10.1007/s10118-013-1240-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Tioni E, Monteil V, McKenna T. Morphological Interpretation of the Evolution of the Thermal Properties of Polyethylene during the Fragmentation of Silica Supported Metallocene Catalysts. Macromolecules 2012. [DOI: 10.1021/ma302150v] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Estevan Tioni
- UMR 5265 Laboratoire de Chimie Catalyse Polymères et Procédés
(C2P2), LCPP team, Université de Lyon, Univ. Lyon 1, CPE Lyon, CNRS, Bat 308F, 43 Bd du 11 novembre 1918,
F-69616 Villeurbanne, France
- Dutch Polymer Institute (DPI), PO Box
902, 5600 AX Eindhoven, The Netherlands
| | - Vincent Monteil
- UMR 5265 Laboratoire de Chimie Catalyse Polymères et Procédés
(C2P2), LCPP team, Université de Lyon, Univ. Lyon 1, CPE Lyon, CNRS, Bat 308F, 43 Bd du 11 novembre 1918,
F-69616 Villeurbanne, France
| | - Timothy McKenna
- UMR 5265 Laboratoire de Chimie Catalyse Polymères et Procédés
(C2P2), LCPP team, Université de Lyon, Univ. Lyon 1, CPE Lyon, CNRS, Bat 308F, 43 Bd du 11 novembre 1918,
F-69616 Villeurbanne, France
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AFM OBSERVATIONS OF MELTING BEHAVIOR OF POLY(ETHYLENE OXIDE) SINGLE CRYSTALS ON IPB-1 SUBSTRATES WITH DIFFERENT LAMELLAR ORIENTATION. ACTA POLYM SIN 2012. [DOI: 10.3724/sp.j.1105.2012.12073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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