聚丙烯酸酯/聚硅氧烷乳胶粒核壳结构相反转及控制  

Control of Phase Conversion of Acrylate/siloxane Copolymer Latex

作　　者：夏宇正[1] 石淑先[1] 李敬玮[1] 李素青[1] 洪斌[1] 焦书科[1] 

机构地区：[1]北京化工大学新型高分子材料的制备与加工北京市重点实验室,北京100029

出　　处：《胶体与聚合物》2004年第1期1-4,10,共5页Chinese Journal of Colloid & Polymer

摘　　要：采用乳液聚合法,以丙烯酸丁酯(BA)、甲基丙烯酸甲酯(MMA)、八甲基环四硅氧烷(D4)为单体,甲基丙烯酰氧丙基三甲氧基硅烷(MATS)或甲基丙烯酸羟乙酯(HEMA)为偶联剂,十二烷基苯磺酸钠(SDBS)为乳化剂,过硫酸铵(APS)和十二烷基苯磺酸(DSBA)为复合引发剂,经乳液自由基与缩聚同步反应,制得具有核壳结构的聚丙烯酸酯(核)/聚硅氧烷(壳)共聚物乳液。考察了交联剂二缩三丙二醇双丙烯酸酯(TPGDA)对乳胶粒核壳结构的影响,结果表明不加交联剂的共聚乳液放置一定时间.乳胶粒核壳结构发生相反转,最终变成以聚硅氧烷为核、聚丙烯酸酯为壳的热力学稳定结构;加入交联剂可以有效控制乳胶粒核壳结构,乳液放置一定时间乳胶粒核壳结构不变。In this paper, the emulsion of poly - acrylare/siloxane for coating material with the core -shell were synthesized from butyl acrylate (BA), methyl methacrylate (MMA), octamethyl tetrasiloxane (D4), propyl methacylic triethoxylsiloxane (MATS) or hydroxylethyl methylacrylate (HEMA) through the one step process with ammonia persulfate (APS) and dodecyl benzene sulfonic acid (DBSA) as initiator. The results showed that the morphological structure of the poly-acrylare/ siloxane copolymer latex has the properties of phase conversion and the copolymer modified with tripropanyl glycol diacrylate (TPGDA) was in favor of providing the polysiloxane shell moving to the nucleus of the latex cell.

关 键 词：聚丙烯酸酯 聚硅氧烷 乳胶粒 核壳结构 相反转 丙烯酸丁酯 复合引发剂 交联剂 

分 类 号：TQ331.47[化学工程—橡胶工业]