Abstract: The semi-continuous bulk copolymerization of N -phenylmaleimide and styrene was carried out in the presence of polybutadiene(PB). The phase inversion, refractive index and the rheological behavior of the polymerizing mass, and the grafting ratio of N -phenylmaleimide-styrene copolymer onto PB in the course of polymerization were investigated. The results indicated that the phase inversion occurred in a relatively wide range of time. In the phase inversion region, the refractive index changed irregularly and the grafting ratio increased sharply, while the viscosity of the polymerizing mass declined.On-line monitoring of agitating torque for the reactor is very useful to identify the region of phase inversion.

摘要： 针对N -苯基马来酰亚胺 -苯乙烯 -聚丁二烯三元半连续本体聚合体系 ,研究了聚合过程中相态、折射率、接枝率及流变行为 .发现聚合过程中的相转变有一个过程 ,在这个过程中 ,物料的折射率发生不规则的变化 ,接枝率突然增大 ,而体系黏度下降 .研究发现 ,反应器搅拌扭矩的在线检测对确定聚合过程中的相转变十分有效 .