乙烯-甲基丙烯酸共聚物离聚体在聚对苯二甲酸乙二酯中的相分离行为

PHASE SEPARATION BEHAVIOR OF SURLYN IN POLY (ETHYLENE TEREPHTHALATE)

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。

Surlyn is the sodium salt of ethylene/methacrylic acid copolymer. The phase separation behavior of blend of Surlyn and Poly(ethylene terephthalate)(PET) has been studied by Scanning Electron Microscope and IR. It is shown that particles of Surlyn are dispersed in PET matrix, and this phase separation is controlled by heat-treated condition of blend. When the thermal treatment temperature is higher, more reaction is occurred between Surlyn and PET, thus the compatibility of Surlyn with PET' enhances and less particles of Surlyn are found.