苯乙烯悬浮聚合工艺条件优化

Improvemeut of Technology for Styrene Suspension Polymerization

研究了影响苯乙烯悬浮聚合的主要因素。探讨了引发剂用量、搅拌速度、反应温度、分散剂用量、水和单体的体积比对苯乙烯悬浮聚合的影响。结果表明,在苯乙烯用量为20 mL、水与单体的体积比为5∶1（即水用量为100mL）、分散剂聚乙烯醇用量为0.073 g、引发剂过氧化二苯甲酰用量为0.7 g、搅拌速度为400 r·min^-1、反应温度为80-85℃的最佳悬浮聚合条件下,得到了颗粒尺寸适中、透明度良好、产率高达98.95%的聚苯乙烯。

The effects of main influential factors such as the amount of initiator, stirring speed, reaction temperature, the amount of dispersant,and the volume ratio of water to monomer on the suspension polymerization of styrene were studied. The experimental results showed that the optimum conditions were as follows：styrene 20 mL,the volume ratio of water to monomer 5 ： 1, dispersant （polyvinyl alcohol）0. 073 g, initiator （benzoyl peroxide） 0.7 g, stirring speed 400 r · min^-1 ,and reaction temperature 80-85℃. Under above conditions, the polystyrene with appropriate particle size,good transparency and high yield of 98.95 % was obtained.