无皂乳液法制备聚甲基丙烯酸甲酯/改性凹凸棒土复合微球及其性能研究  

PREPARATION AND PERFORMANCE OF POLYMETHYL METHACRYLATE/ORGANIC-ATTAPULGITE COMPOSITE PARTICLES BY NONSOAP EMULSION POLYMERIZATION

作　　者：孙洪秀[1,2] 曹青华[1,2] 庄韦[1,2,3] 张洪文[2] 

机构地区：[1]常州大学材料科学与工程学院,江苏常州213164 [2]常州南京大学高新技术研究院,江苏常州213164 [3]常州鸿创高分子科技有限公司,江苏常州213164

出　　处：《精细石油化工》2011年第5期36-41,共6页Speciality Petrochemicals

摘　　要：凹凸棒土(AT)经提纯后,使用γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)对其进行有机改性,得到有机化的凹凸棒土(OAT),并对其进行FT-IR、TG表征。结果表明,KH-570对凹凸棒土起到了良好的修饰改性作用。采用无皂乳液法制备了聚甲基丙烯酸甲酯(PMMA)/改性凹凸棒土(OAT)核壳复合微球。借助扫描电镜、红外光谱、纳米激光粒度仪、热失重分析和差示扫描量热等检测手段对复合微球进行了形貌探测和结构表征,结果表明其粒径大约为300nm,且分布比较均匀。通过对复合微球的综合热性能进行分析,发现PMMA/OAT-3%复合微球的分解10%的温度、玻璃化转化温度比纯PMMA分别高出4.78℃和20.94℃。Organic-attapulgite （OAT） was obtained by organic modification, and we characterized it by FT-IR and TG. The results showed that the modification effect of graft silane coupling agent was well. Polymethyl methacrylate（PMMA）/OAT core/shell composite microspheres have been achieved by nonsoap emulsion polymerization. Composite microspheres were investigated by SEM, FT-IR, la- ser scattering particle analyzer, DSC and TGA. The results showed that the average particle size of PMMA/OAT core/shell composite microspheres was about 300nm and equably uniform. In contrast with pure PMMA, 10% decomposition temperature, glass transition temperature of PMMA/OAT-3 % were respectively improved by 4.78, 20.94 ℃.

关 键 词：凹凸棒土 有机改性 复合微球 无皂乳液聚合 聚甲基丙烯酸甲酯 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]