摘要
聚己内酯（ＰＣＬ）中加入与其有一定混溶性的非晶组分乙基纤维素（ＥＣ），可明显影响其长环带球晶的行为．表明具有低混溶性及某种分子间相互作用的二元共混体系ＰＣＬ／ＥＣ仍能在一定温度范围内形成环带球晶；良好的混溶性，强的分子间相互作用并非是二元共混体系中ＰＣＬ长环带球晶不可缺少的因素．通过偏光显微镜发现ＰＣＬ的加入有利于乙基纤维素／二氯乙酸溶液中液晶相的形成，用Ｆｌｏｒｙ关于棒状分子无规线团溶剂三元体系的理论对其进行了讨论．
The compatibility, specific interaction and ringed spherulite morphology of PCL/EC blends have been studied by DSC, FTIR and optical microscopy. It is shown that the blend is characteristic of low compatibility and weak specific interaction. Distinct ringed spherulites in such a system suggest that high compatibility and strong interaction between components may not be an essential factor for their formation. Addition of PCL into the ethyl cellulose/dichloroacetic acid solution was favorable for the formation of cholesteric liquid crystalline mesophases. The results are explained in terms of Florys theory about stafflike moleculerandom chain moleculesolvent ternary system.
出处
《应用化学》
CAS
CSCD
北大核心
1999年第2期5-8,共4页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金
国家重大基金
关键词
聚己内酯
乙基纤维素
共混物
环带球晶
液晶
polycaprolactone,ethyl cellulose,blend,ringed spherulite,compatibility,lyotropic liquid crystal
