甲基丙烯酸甲酯-γ-甲基丙烯酰氧基丙基三甲氧基硅烷细乳液共聚合研究  

MINIEMULSION COPOLYMERIZATION OF METHYL METHACRYLATE AND γ-(METHACRYLOXY) PROPYLTRIMETHOXY SILANE

作　　者：夏宇静[1] 余樟清[1] 倪沛红[1] 

机构地区：[1]苏州大学化学化工学院江苏省有机合成重点实验室(苏州大学),江苏苏州215006

出　　处：《高分子材料科学与工程》2005年第1期102-105,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(20276044)

摘　　要：将甲基丙烯酸甲酯(MMA)单体与反应性单体γ-甲基丙烯酰氧基丙基三甲氧基硅烷(A-174)进行细乳液共聚合,获得了MMA-co-(A-174)共聚物乳液。研究了聚合温度、助稳定剂用量、A-174用量及水相中pH调节剂用量对聚合过程动力学的影响。利用红外光谱和透射电镜对共聚产物组成和乳胶粒子形态进行了表征。用气相色谱法(GC)测定了共聚物乳液中微量甲醇含量,结果表明,细乳液聚合工艺可以避免活性硅烷A-174的反应性官能团在聚合过程中被水解损耗。In the present paper, a reactive monomer, γ-(methacryloxy)propyltrimethoxy silane (A-174), was incorporated in methyl methacrylate latex systems via miniemulsion copolymerizaiton. As a result of the reduction of contact with water, the silane moieties were protected from hydrolysis and premature cross-linking. The conversion of mixed monomers was determined by gravimetry. Effects of variation on the rate of copolymerization were investigated, including reactive temperatures, the amount of co-stabilizer, the amount of reactive monomer A-174, and concentration of pH adjusting agent. The chemical structure of MMA-co-(A-174) copolymer was confirmed by FT-IR. The morphology of the latex particles was characterized by transmission electron microscopy (TEM). Gas chromatography was used to determine the trace amount of methanol in latex systems, which yielded from the hydrolysis of silane in the process of miniemulsion polymerization.

关 键 词：细乳液共聚合 活性硅烷 Γ-甲基丙烯酰氧基丙基三甲氧基硅烷 甲基丙烯酸甲酯 

分 类 号：TQ316.334[化学工程—高聚物工业]