论文摘要
The effect of crystallization conditions of poly（butylene succinate）（PBS） component on the crystallization of poly（tetramethylene oxide）（PTMO） component in their segment block copolymer, with a higher PTMO content（PTMO mass fraction is 67%）, was investigated by DSC and temperature-dependent FTIR. It is found that the isothermal crystallization time（tIC） of PBS has an effect on the crystallization behavior of PTMO component. Perturbation correlation move-window two-dimensional（PCMW2 D） correlation analysis and generalized 2 D correlation analysis（2 DIR） were performed to explore the origin of this phenomenon. The PCMW2 D and 2 DIR results show that the correlation intensity peak observed at around 20 ℃ for PTMO is due to the PTMO chains movements forced by the PBS chains folded movements. If tIC of PBS at temperature of 20 ℃ is prolonged, more PTMO components are incorporated in the region between PBS lamellae and the peak at-7.6 ℃（belonging to less-constricted PTMO chains） changes smaller and even disappears, while the peak at-16.3 ℃ belonging to more-constricted PTMO chains gets bigger. A crystallization model was also established in this study. The results of tensile testing showed that tensile strength slightly increased and elongation at break decreased with increasing heat treatment time at 40 ℃.
论文目录
文章来源
类型: 期刊论文
作者: 黄勇,LIU Junhong,ZHANG Aimin,周涛
来源: Journal of Wuhan University of Technology(Materials Science) 2019年02期
年度: 2019
分类: 工程科技Ⅰ辑
专业: 化学
单位: College of Chemical Engineering, Sichuan University of Science & Engineering,Department of Chemical Engineering, Sichuan Vocational College of Chemical Technology,State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute, Sichuan University
基金: Funded by the Science and Technology Program of Sichuan,China(No.2016FZ0033),the Science and Technology Program of Sichuan Luzhou,China(No.2016-S-63(1,3)
分类号: O631
页码: 496-506
总页数: 11
文件大小: 1008K
下载量: 11
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