含碱性功能基聚合物反应性增容体系的研究

含碱性功能基聚合物反应性增容体系的研究胡静，张邦华，宋谋道，周庆业（南开大学高分子化学研究所，天津，３０００７１）关键词聚合物共混，反应性聚合物，碱性功能基，反应性增容通过共混单体方法制备聚合物“合金”是聚合物高性能化、开发材料新品种的主要方法。对于...

Reactive Compatibilization of Polystyrene/Polyethylene Blends Containing Basic Functionalized Polymer

Blends of polystyrene(PS)with polyethylene(PE)or PE melt grafted with maleic anhydride(PE-g-MAH)and copolymerPoly(St-Co-DMA)] of styrene(St)with dimethyl amino ethyl methacrylate(DMA)were prepared by blending in a Brabender mixer.The morphology of these blends was found to have the typical morphology of incompatible blends,where their reactive PS/PE-g-MAH/Poly(St-Co-DMA)blends showed a finer morphology,the particle size was greatly reduced and the size distribution became more uniform.This was attributed to the stronger polar interaction between the acidic anhydride and basic amino groups.Furthermore,the dynamic mechanical analysis measurements showed that the two glass transition temperature(Tg)peaks of reactive blends were closer than those of corresponding nonreactive blends. The mechanical properites of blends were improved.