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聚丁二酸丁二醇酯玻璃化转变行为的分子模拟

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Indexed by:期刊论文

Date of Publication:2012-11-25

Journal:材料导报

Included Journals:PKU、ISTIC

Volume:26

Issue:z1

Page Number:180-183,222

ISSN No.:1005-023X

Key Words:分子动力学;聚丁二酸丁二醇酯;玻璃化转变;力场能量项;氢键

Abstract:玻璃化转变是决定聚合物改性与加工等综合性能的重要环节.基于分子动力学方法,采用NPT(等温等压)正则系综,研究了聚丁二酸丁二醇酯(PBS)的玻璃化转变行为及主要影响因素.结果表明,PBS玻璃化转变温度为243.7K,与前人实验结果较为吻合;二面角扭转能、非键能及分子内氢键强度在243.7K附近发生突变,对PBS的玻璃化转变行为起到重要作用,是导致PBS出现玻璃化转变的根源之一.

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