以二乙烯基苯（DVB）为交联剂，通过悬浮聚合合成了主要粒径范围为0.425~0.850 mm的高交联度聚苯乙烯（PS）微球。考察了反应温度、反应时间、搅拌速率、分散剂种类及用量和水油质量比对微球粒径的影响，确定了最佳聚合工艺：采用分段升温且增加低温段反应时间，搅拌速率为110~130 r/min，主分散剂聚乙烯醇（PVA）质量分数为0.076%，助分散剂磷酸三钙（TCP）质量分数为0.053%，水油质量比为（2~2.6）：1。

Using divinylbenzene (DVB) as crosslinking agent,high crosslinking polystyrene (PS) microspheres with a main particle size ranging from 0.425 mm to 0.850 mm are synthesized via suspension polymerization process.Impacts of reaction temperature and time,stirring speed,the type and amount of dispersant,water-oil ratio on the particle size of the microspheres are studied.The optimal polymerization process is determined as follows:the temperature increases stepwise and stays at low temperature range for longer time,stirring speed is in the range of 110-130 r·min^-1,mass fraction of polyvinyl alcohol (main dispersant) is 0.076%,the mass fraction of tricalcium phosphate (auxiliary dispersant) is 0.053%,and water-oil ratio is (2-2.6):1.

刘凯(1996-),男,硕士研究生,研究方向为聚合物合成及应用,kevin-liukai@126.com