【摘要】 比较了常规乳液聚合和无皂乳液聚合对丙烯酸(AA)/甲基丙烯酸甲酯(MMA)共聚物性能的影响,探讨了各种氧化还原引发体系、氧化剂用量、单体配比、搅拌速率以及还原剂的滴加速率对单体转化率的影响。研究结果表明,采用无皂乳液聚合法,以过硫酸钾(KPS)/亚硫酸氢钠(SHS)为氧化还原引发体系,当引发反应温度为50℃、m(KPS)∶m(SHS)=1∶2、氧化剂KPS用量为0.15～0.25g、m(MMA)∶m(AA)=10∶1、搅拌速率为450r/min和还原剂SHS溶液滴加时间为30min时,AA/MMA无皂自乳化聚合反应能够快速顺利进行,并且能获得单体转化率较高、性能较好的稳定乳液。更多还原

【Abstract】 The influences of general emulsion polymerization and soap-free emulsion polymerization on AA/ MMA copolymer performance were compared. At the same time, the influences of the types of redox initiators, oxidant content, ratio between AA and MMA, mix round speed and dripping speed of reductant on conversion of monomer were discussed. The research result showed that with the KPS/SHS(potassium persulphate/sodium hydrosulphite) as redox initiator system, the AA/MMA soap-free self-emulsion-polymerization could go on wheels rapidly, and the stable copolymer emulsion which had higher conversion of monomer and better performance was obtained when reaction temperature of initiators was 50 ℃, mass ratio of KPS to SHS was 1∶2, dosages of oxidant KPS were 0.15-0.25 g, mass ratio of MMA to AA was 10∶1, mix round speed was 450 r/min, and dripping time of reductant was 30 min.更多还原