Relaxation dynamics of stretched polymer chains traced by shear induced Shish‐Kebab structure |
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| Authors: | Xi Jiang Qi Liao Jianjun Zhou Zhaohui Wang Chiming Chan Lin Li |
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| Affiliation: | 1. Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, , Beijing, 100875 China;2. Institute for Materials Science and Engineering, Kyushu University, 819-0395, , Fukuoka, Japan;3. Institute of Chemistry, Chinese Academy of Sciences, , Beijing, 100190 China;4. Department of Chemical Engineering and Biomolecular Engineering and Division of Environment, The Hong Kong University of Science and Technology, , Hong Kong |
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| Abstract: | We have developed a morphologic method to investigate the relaxation processing of the stretched polymer chains in melts, in which an atomic force microscope probe was used to shear the surface of an isotactic polypropylene melt to obtain the isolated shish‐kebab structure. We present the results of the time dependence of length of the isolated shish‐kebab structure and the stress dependence of the kebab density along the direction of shish in this paper. Our results demonstrate that the shear‐oriented polymer melts show the relaxation dynamics of worm‐like chain where the length deficit of the isolated shish‐kebab structure is scaled with the relaxation time as a power of 1/3. The melting behavior of shish‐kebab structure was also investigated. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2013, 51, 907–914 |
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| Keywords: | atomic force microscopy (AFM) poly(propylene) (PP) relaxation |
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