丙烯酸酯共聚物/有机硅改性凹凸棒土复合材料的制备及性能研究  

Preparation and Characterization of PMMA-PBA/Organic-Attapulgite Nanocomposites

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

机构地区：[1]常州南京大学高新技术研究院,江苏常州213164 [2]常州大学材料科学与工程学院,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：《塑料工业》2011年第9期61-65,共5页China Plastics Industry

基　　金：江苏省2010年度企业博士集聚计划项目

摘　　要：凹凸棒土(AT)经提纯后,通过使用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FTIR和XRD表征,结果表明,KH570对凹凸棒土起到了良好的修饰改性作用。采用悬浮复合法合成了AT用量为0～5 phr的聚甲基丙烯酸甲酯(PMMA)-聚丙烯酸丁酯(PBA)/凹凸棒土纳米复合材料(PMMA-PBA/(KH570-AT)-x),对复合材料进行扫描电子显微镜(SEM)、动态力学分析(DMA)和热重分析TGA等表征。SEM结果表明,KH570-AT的加入使复合材料断裂由脆性断裂向韧性断裂转变。通过对复合材料的综合热性能分析和力学性能分析,PMMA-PBA/KH570-AT-3复合材料的拉伸强度、弯曲强度和玻璃花转变温度(Tg)比纯PMMA-PBA分别高出15.72%、34.59%和4.74℃。Organic-attapulgite （KH570-AT） was obtained by organic modification, and was character- ized by FTIR and XRD. The results showed that the modification effect of KH570 on the AT was well. Then the PMMA-PBA/（KH570-AT）-x （x = 0 -5 phr） nanocomposites were respectively prepared by suspension polymerization. The nanocomposites were characterized by SEM, DMA, TGA, and so on. The SEM showed that the addition of KH570-AT made the compounds transform from brittle fraction to ductile fracture. The mechanical capability and thermal analysis of the nanocomposies were also measured. In contrast with pure PMMA-PBA, the tensile strength, flexural strength and Tg of PMMA-PBA/KH570-AT-3 were respectively improved by 15.72 % , 34.59% and 4. 74 ℃.

关 键 词：凹凸棒土 硅烷偶联剂 丙烯酸酯共聚物 纳米复合材料 

分 类 号：TB33[一般工业技术—材料科学与工程]