聚氧化乙烯-聚苯乙烯-聚氧化乙烯三嵌段共聚物/聚苯醚共混物的相容性和结晶行为

THE COMPATIBILITY AND CRYSTALLIZATION BEHAVIOR OF PEO-PS-PEO TRIBLOCK COPOLYMER/PPO HOMOPOLYMER BLENDS

本工作对聚氧化乙烯-聚苯乙烯-聚氧化乙烯(PEO-PS-PEO)三嵌段共聚物与聚苯醚(PPO)均聚物共混物的相容性及结晶行为进行了研究。结果表明,共混体系的相容性与嵌段共聚物中苯乙烯段的含量有关,PS含量越高,PPO与共聚物PS段的相容性越好。共混体系的结晶行为也明显不同于一般均聚物共混体系。在DSC降温结晶过程中最多可出现三个结晶峰。

The compatibility and crystallization behavior of ethylene oxide-styrene-ethylene oxide triblock copolymer (PEO-PS-PEO)/Polyphenyleneoxide (PPO) blends have been studied. The higher the PS content in PEO-PS-PEO copolymer, the better the compatibility of its mis-ture with PPO homopolymer. From the crystallization point of view, PEO-PS-PEO copolymer in the blends crystallizes in a very different way with blend composition, and the crystallization features, such as many crystallization peaks in DSC thermograms obtained during cooling, are really different from those of homopolymer blends.