摘要
通过悬浮聚合法制取了分子量在100万-150万范围的聚甲基丙烯酸甲酯（PMMA）。研究了温度、引发剂浓度、转化率对聚合物分子量的影响情况,用粘度法测量了PMMA的分子量。结果表明：温度升高、引发剂用量增加使得聚合物分子量降低;随反应的进行和单体转化率提高,聚合物分子量增大并趋于定值。在单体∶水相=1∶5（质量比）,过氧类引发剂浓度1%,反应温度60-70℃,反应时间5h左右的实验条件下,制备得到了高分子量PMMA。
Poly（methyl methacrylate） with molecular weight from 1.0×10^6 to 1.5×10^6 were prepared by suspension polymerization, the influences of temperature, concentration of initiator, and conversion rate on molecular weight were studied. The viscometric average molecular weight of polymer was measured. The results showed that the molecular weight decreased with the temperature and the concentration of initiator increasing. The polymerization condition for required molecular weight was that the peroxide initiator was 1%; MMA ： water= 1：5 （weight ratio） ; reaction temperature and time were 60-70℃ and 5h respectively.
出处
《化工新型材料》
CAS
CSCD
北大核心
2007年第12期42-43,共2页
New Chemical Materials
关键词
聚甲基丙烯酸甲酯
高分子量
悬浮聚合
poly（methylmethacrylate）, high molecular weight, suspension polymerization
