聚醚中聚合物分散粒子的形态对体系稳定性和粘度的影响

Influence of Morphologies of Dispersed Particles in Polyether Polyol on Its Stability and Viscosity

以苯乙烯和丙烯腈在聚醚中的分散聚合制备了聚合物聚醚（ＰＯＰ）．用电镜观察了不同合成条件下分散粒子的形态。发现工艺因素可改变分散粒子的形态，从而影响ＰＯＰ的性质，颗粒聚集是影响体系稳定性和粘度的主要因素，在适宜的合成条件下，可获得稳定的表面光滑的孤立圆球，相应的ＰＯＰ具有低的粘度。

In this paper,the morphologies of polymer particles in polyether polyol(POP)have been observed,which was prepared from styrene and acrylonitrile by using dispersionpolymerization in polyether polyol under various conditions.It has been found that techno-logical conditions can change the morphologies of the particles and then affect the propertiesof POP.Aggregation of the particles is a main factor that influences the stability and viscosi-ty of the dispersion. Separate spheres with smooth surface can be obtained under suitableconditions and the corresponding POP is of lower viscosity.