关键词: 聚氯乙烯, 增塑糊, 复配, 黏度, 稳定性

Abstract: Viscosity and its stability over time of PVC plastisols were studied based on compounds of two different PVC paste resins, suspension polymerized ones (P1) and MSP-3 ones（P2）. P1 had a similar polymerization degree with that of P2. When the ratio of P1/P2 is 80/20, the plastisol exhibited the highest viscosity and worst stability.When the ratio of P1/P2 is 50/50, a lower viscosity and the best stability were observed. Different sequences of the blending of P1 and P2 led to the variation of the viscosity and its stability of the plastisols. While adding P2 to P1, the viscosity of the plastisols increased , and its stability became worse; the effect of particle morphology of the paste resin outpaced that of particle diameter. Nevertherless, while adding P1 to P2, the viscosity of the plastisols decreased , and its stability became better ; which attributed to the optimization of particle morphology of the paste resin and particle diameter.

Key words: poly(vinyl chloride), plastisols, compounding, viscosity, stability