超支化聚合物接枝纳米TiO2/环氧树脂复合材料的制备与表征  

Preparation and characterization of composites of epoxy resin and nano-TiO_2 grafted by hyperbranched polymer

作　　者：熊磊[1] 王汝敏[1] 梁红波[2] 管静[2] 

机构地区：[1]西北工业大学理学院应用化学系,陕西西安710072 [2]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《中国胶粘剂》2009年第4期26-30,共5页China Adhesives

基　　金：江西省教育厅科技计划项目{赣教技字[2007]165号}

摘　　要：利用偶联剂KH-550和超支化聚(胺-酯)(HBP)对纳米TiO2进行改性,并制备了纳米TiO2/环氧树脂(EP)复合材料。对复合材料的结构、力学性能、加工性能以及热性能进行了研究。研究结果表明,HBP接枝改性纳米TiO2(TiO2-g-HBP)的引入可明显提高复合材料的力学性能、热性能及加工性能;当w(TiO2-g-HBP)=1%时,复合材料的力学性能最好,其冲击强度和弯曲强度比纯EP分别提高了135.51%和22.98%;扫描电镜(SEM)结果显示,TiO2-g-HBP/EP复合材料由脆性断裂转变为韧性断裂。Nano-TiO2 was modified by coupler KH-550 and hyperbranched poly （amine-ester）（HBP）,and nano-TiO2/epoxy resin （EP） composites were prepared. The structure,mechanical properties,processing properties and thermal properties of the composites were studied. The research results showed that the nano-TiO2 grafted and modified by HBP（namely TiO2-g-HBP） could obviously improve the mechanical properties,thermal properties and processing properties of composites. When mass fraction of TiO2-g-HBP was 1% ,the mechanical properties were best,impact strength and flexural strength of composites were 135.51% and 22.98% respectively more than of pure EP. The SEM showed that the fracture pattern of TiO2-g-HBP/EP composites was changed from brittle fracture to ductile fracture.

关 键 词：超支化聚(胺-酯) 纳米TIO2 环氧树脂 复合材料 力学性能 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]