VTES/BA/MMA氧化-还原引发体系的研究  

The preparation of polyacrylates emulsion modified with organosilicons by redox initiator

作　　者：严微[1] 刘静[1] 彭慧[1] 程时远[1] 

机构地区：[1]湖北大学化学与材料科学学院,湖北武汉430062

出　　处：《湖北大学学报（自然科学版）》2005年第3期254-256,共3页Journal of Hubei University：Natural Science

摘　　要：用过硫酸铵((NH4)2S2O8)/亚硫酸氢钠(NaHSO3)氧化-还原引发体系制备了乙烯基三乙氧基硅烷(VTES)改性甲基丙稀酸甲酯(MMA)/丙烯酸丁酯(BA)聚合物乳液,研究了不同引发体系和反应温度下的时间-转化率曲线,得出该体系的最佳实验条件为VTES(质量分数)为10%,氧化剂与还原剂摩尔比为1∶1,反应温度为50℃.在对乳液和乳胶膜的性能研究中发现,VTES的加入显著提高了乳胶膜的耐水性.由于交联结构的形成,乳胶膜的抗拉强度明显提高,但断裂伸长率有下降.In the copolymerization of vinyl - triethoxysilane （VTES） and acylates, the relation of conversion rate and time was investigated at different temperatures and in different initiator systems. Best prepration condition of VTES（wt） at 10 % was got when （NH4 ）2S2O8/NaHSO3 was 10 mmol/10 mM and polymerization temperature was 50 ℃. The results showed that with the introduction of VTES, better water - resistance and stress at break of latex film were reached,and poor elongation at break was led by the formation of crossing - linking structure.

关 键 词：氧化-还原引发体系 乙烯基三乙氧基硅烷 

分 类 号：O623[理学—有机化学]