A living polymerization process for preparation of poly(vinyl chloride) (PVC) with controlled molecular weight and molecular weight distribution is described. The polymerization reaction can be initiated by various polyhalocarbon initiators in conjunction with non-metallic reducing single electron transfer reagents as catalysts and accelerated by electron shuttles. The process occurs at room temperature in water or water-organic solvent medium. The polymerization provides PVC with a controlled molecular weight and narrow molecular weight distribution. The halogen containing polymer compositions are useful as, among others, viscosity modifiers, impact modifiers and compatibilizers.
本文介绍了一种用于制备具有可控分子量和分子量分布的聚
氯乙烯(P
VC)的活聚合工艺。聚合反应可由各种聚卤烃
引发剂与作为催化剂的非
金属还原单电子转移试剂共同引发,并由电子梭加速。该过程在室温下于
水或
水有机溶剂介质中进行。聚合反应可使聚
氯乙烯具有可控的分子量和较窄的分子量分布。含卤聚合物组合物可用作粘度调节剂、抗冲击调节剂和相容剂等。