聚对苯二甲酸乙二酯(PET)结晶速度很慢,通常加入成核剂来提高结晶速度。从专利文献来看,以离子聚合物为成核剂的例子也是很多的。离子聚合物与小分子成核剂的显著差别是:离子聚合物有一个很长的碳氢主链,其侧基为酸基,酸基被部分或全部地中和成盐。很明显,离子聚合物不象小分子成核剂那样能很好地分散在PET基体中,而是以独立的相存在。作为PET体系系列研究的继续,本文报道了离子聚合物Surlyn在PET中的相分离行为。 Polyethylene terephthalate (PET) crystallizes very slowly, usually by adding nucleating agents to increase the crystallization rate. From the patent literature, there are many examples using ionic polymers as nucleating agents. The significant difference between ionic polymers and small molecule nucleating agents is that the ionic polymer has a long hydrocarbon backbone with pendant acid groups and the acid groups are partially or fully neutralized to form salts. It is clear that ionic polymers do not disperse well in the PET matrix like small molecule nucleating agents, but exist as separate phases. As a continuation of the series of PET systems, this paper reports the phase separation behavior of Surlyn in PET.