Abstract: The rheological behavior of HIPS prepolymers with rubber having different molecular weights were studied. It was found that, besides the phase inversion point, there existed another minimum on the apparent visco-sity-versus-conversion curve at about 7% conversion. The rheological characteristics of the prepolymers were also affected by agitation speed, viz , the higher the speed, the lower the apparent viscosity of the prepolymer obtained. These phenomena were explained in terms of the two-phase characteristics of the prepolymer. Furthermore, the temperature effect on the prepolymer Theological behavior was investigated, and the apparent visco-sity(ηa)can be correlated with temperature(T)and shear rate(γ)by where A1, A2, B1 and B2 are regression coefficients.

摘要： 在研究不同橡胶分子量的高抗冲聚苯乙烯预聚体的流变行为时,发现除转相点外,在表观粘度-转化率曲线上约7%转化率处表观粘度又有个极小点;而且,预聚体的流变特性受搅拌速率的影响.此外还研究了温度对预聚体流变行为的影响,得到以下表观粘度-温度关系式η_α=B_2γ~(A_2)exp[(B_1·γ~(A_1)/T]