悬浮聚合法制备PMMA/OAT复合微球及其性能研究  

Preparation and performance of PMMA/organic-attapulgite composite particles by suspension polymerization

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

机构地区：[1]常州大学材料科学与工程学院,常州213164 [2]南京大学常州高新技术研究院,常州213164 [3]南京大学化学化工学院,南京210093

出　　处：《化工新型材料》2011年第12期103-106,共4页New Chemical Materials

摘　　要：通过对凹凸棒土(AT)进行有机改性,得到有机化凹凸棒土(OAT)。以硅烷偶联剂(KH-570)改性过的AT为核,羟乙基纤维素(HEC)为分散剂,过氧化苯甲酰(BPO)为引发剂,在水溶液中,采用悬浮聚合法制备了PMMA/OAT核壳复合微球。借助扫描电镜(SEM)、透射电镜(TEM)、红外光谱(FT-IR)、热失重分析(TGA)和差示扫描量热(DSC)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:这种PMMA/OAT核壳复合微球的粒径大约为450nm,粒径分布均匀。通过对复合微球的综合热性能进行分析,发现PMMA/OAT-3复合微球分解10%的温度(T0.1)、玻璃化转化温度(Tg)比纯PMMA分别高出4.78℃、19.98℃,复合材料的热稳定性明显提高。Organic-attapulgite （OAT） was obtained by organic modification. PMMA/OAT core/shell composite microspheres have been achieved by suspension polymerization in an aqueous medium using coupling agent （KH-570） modified attapulgite as core, hydroxyethyl cellulose （HEC）as stabilizer and benzoyl peroxide （BPO）as the initiator. Composite microspheres were investigated by SEM, TEM, FT-IR, DSC and TGA. The results showed that the average particle size of PMMA/OAT core/shell composite microspheres was about 450nm and equably uniform. In contrast with pure PMMA, 10%decomposition temperature（T0. 1）,glass transition temperature （Tg） of PMMA/OAT-3 were respectively improved by4. 78 ℃, 10. 18℃. The thermal stability of nanocomposites was markedly improved.

关 键 词：凹凸棒土 有机改性 硅烷偶联剂 复合微球 悬浮聚合 

分 类 号：TQ323.42[化学工程—合成树脂塑料工业]