氯乙烯
醋酸乙烯酯
材料科学
悬浮聚合
单体
聚合
悬挂(拓扑)
聚氯乙烯
膜
高分子化学
乙烯基聚合物
化学工程
复合材料
聚合物
化学
共聚物
生物化学
工程类
同伦
纯数学
数学
标识
DOI:10.1179/146580199101540178
摘要
AbstractAbstractWhen partially hydrolysed poly(vinyl acetate) (PVAc) is used as a suspending agent in the suspension polymerisation of vinyl chloride monomer, it has significant effects on the morphology of the resulting poly(vinyl chloride) (PVC) particles. At the initial step of polymerisation, PVC molecules are grafted onto the molecules of the suspending agent forming a PVC–PVAc membrane. The properties of this membrane depend on the type of suspending agent, the polymerisation temperature, the mixing efficiency, and other factors. The morphology of the growing PVC particles and the properties of the PVC resin obtained depend in turn on the characteristics of the membrane. A model has been developed relating to the connection between the polymerisation conditions and the characteristics of the suspending agent on one hand, and on the PVC properties on the other hand. The model is based on an analysis of the characteristics of the PVC–PVAc membrane and their effect on PVC properties.
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