不相容聚合物共混物受限结晶行为的研究进展

Study on Confined Crystallization Behavior of Immiscible Polymer Blends

不相容聚合物共混是一种获得综合性能优异的高分子材料的有效途径。当结晶聚合物作为分散相均匀地分布在不相容聚合物基体相中,并且其分散相数目大于活跃的异相成核物质数目时,在冷却过程中会发生受限结晶(分级结晶)现象。分散相中缺少活跃的异相成核物质是不相容共混物发生受限结晶的关键因素。从受限结晶的产生总结了近年来不相容共混物中受限结晶的研究进展,并概述了增容剂、填料、退火、分散相尺寸及其分布和结晶温度等因素对受限结晶行为的研究。

Blending of immiscible polymers was an efficient way to obtain polymeric materials with highperformance properties. If the crystalline polymer was finely dispersed into droplets whose numbers was greater than that of active heterogeneities, the confined crystallization behavior would be observed during cooling. The key factors of fractionated crystallization behavior lack the highly active heterogeneous nuclei in the drop- lets. In this paper, the progress in the study on confined crystallization of immiscible polymer blends was reviewed. The influence of various factors such as compatibilizers, fillers, anneal, the size of droplets, the droplet size distribution and crystalling temperature on the confined crystallization of immiscible polymer blends were also summarized.