Quantitative molecular characterization of oriented semi-crystalline polymers |
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| Affiliation: | 1. State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163, Xianlin Ave., Nanjing, 210023, PR China;2. Department of Environmental Science and Engineering, Nanjing University Jinling College, 8, Xuefu Road, Nanjing, 210089, PR China;3. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, 1, Xikang Road, Nanjing, 210098, PR China;1. Institute of Thermal Science and Power Engineering, Wuhan Institute of Technology, Wuhan 430205, China;2. School of Power Engineering, Naval University of Engineering, Wuhan 430033, China;3. Hubei Provincial Engineering Technology Research Center of Green Chemical Equipment, Wuhan 430205, China;4. School of Mechanical & Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205, China;1. Department of Cardiovascular Surgery, Saitama Medical Center, Jichi Medical University, Saitama, Japan;2. Department of Nephrology, Saitama Medical Center, Jichi Medical University, Saitama, Japan;3. Department of Allergy and Clinical Immunology, National Research Institute for Child Health and Development, Setagaya-ku, Tokyo, Japan;4. Department of Cardiology, Saitama Medical Center, Jichi Medical University, Saitama, Japan |
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| Abstract: | ![]()
The stress-strain birefringence relations obtained from the hot drawing of poly(ethylene terephthalate) films are analysed within the framework of non-Gaussian models of rubber elasticity. It is found that, in spite of the increasing influence of strain-induced crystallization for higher draw ratios, the proposed treatment of experimental results leads to the definition of the number of statistical links per elastic chain in the amorphous part of the sample for any state of elongation. The results suggest a progressive disentanglement of the physical network structure and make possible an evaluation of the limit of extensibility attainable in cold-drawing. |
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