HIPS/SBS共混物的形态结构和性能

MORPHOLOGY AND MECHANICAL PROPERTIES OF HIPS/SBS BLENDS

通常,高抗冲聚苯乙烯(HIPS)为多相体系,由连续聚苯乙烯(PS)相和分散的聚丁二烯(PB)颗粒组成。PB含量一般为5～15%,粒径范围为0.5～10μm,PB颗粒是交联的,同时含有接枝的PS,其内部结构由制备工艺决定。HIPS力学性能与其制备工艺、PB含量、PB分子结构、相区尺寸及内部结构密切相关。PS和PB嵌段共聚物(SBS)通常为热塑弹性体,由于PS段和PB段的不相容性而呈现微相分离的结构特征。SBS常用于与其它聚合物共混以增加后者的韧性。本工作研究了HIPS/SBS共混物的形态结构和力学性能。

In the blends of high impact polystyene (HIPS) with styrene-butadiene triblock copolymer (SBS) the SBS can be considered as both toughening angent of HIPS and compatibilizer for PS and PB phases in the HIPS. Addition of SBS into HIPS resulted in a marked increase of impact resistance of the latter.