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OALib Journal期刊
ISSN: 2333-9721
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长侧基甲壳型液晶高分子的合成及性质研究
DOI: 10.3724/SP.J.1105.2011.11012, PP. 1311-1319
Keywords: 甲壳型液晶高分子,长侧基,近晶相
Abstract:
设计并合成了一系列尾链为不同长度烷氧基的长侧基甲壳型液晶高分子聚[2,5-二(4'-烷氧基联苯氧羰基)苯乙烯](PnCbiPCS,n=4,6,8,10,14).这些聚合物都具有良好的热稳定性.偏光显微镜及一维和二维广角X射线衍射等研究结果表明PnCbiPCS这一系列聚合物均能形成稳定的近晶A相结构,所对应的层间距随末端尾链的增长而增加,当n=4,6时层间距与侧基的理论长度相同,n≧8时层间距小于理论值,形成部分穿插的近晶A相结构.在剪切力场作用下,所有这些聚合物所形成的近晶相均易发生宏观取向,近晶层法线方向与剪切方向垂直.
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