PMMA/SiO_2杂化纤维的制备及表征  

Preparation and Characterization of PMMA/SiO_2 Hybrid Fibers by Sol-Gel Method

作　　者：马海红[1] 史铁钧[1] 宋秋生[1] 

机构地区：[1]合肥工业大学化工学院,安徽合肥230009

出　　处：《高分子材料科学与工程》2008年第12期46-49,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50373010)

摘　　要：以正硅酸乙酯(TEOS)和PMMA低聚体为原料,乙烯基三乙氧基硅烷(VTEOS)为偶联剂,采用溶胶-凝胶法制备了PMMA/SiO2杂化溶胶,陈化后用提拉法制得PMMA/SiO2杂化纤维。研究了溶胶的杂化反应机理、成纤性能;使用IR、SEM、TGA及DSC分析了杂化纤维的结构与性能。结果表明,该杂化溶胶具有很好的拉丝性能,黏度为180 Pa.s^300 Pa.s时的成纤性能好,所制得的杂化纤维,其中PMMA与SiO2之间通过化学键连接,在纤维内部有机无机相间形成均一的连续相;其耐热性能优于纯PMMA。By Sol-Gel method, PMMA/SiO2 hybrid sol was prepared with tetrethorylsilane （TEOS） and low molecular weight polymer of polymethyl methaerylate （PMMA） as raw materials, vinyltrithorysilane （VTEOS） as coupling agent, after being aged, PMMA/SiO2 hybrid fibers were prepared by drawing from the hybrid sol. The mechanism of the hybrid reaetion, spinnablity of the hybrid sol, structure and micromorphology of the fiber were studied by FT-IR, SEM, TGA and DSC. The results show that the hybrid sol can be drawn into fibers when its viscosity becomes 180 Pa·s- 300 Pa·s, PMMA is linked with SiO2 network by chemical bonds, in the interior of the fiber, a homogeneous and continuous phase is formed by organic and inorganic components, and the hybrid fiber is better in resistance to heat than pure PMMA.

关 键 词：溶胶-凝胶法 有机-无机杂化 聚甲基丙烯酸甲酯 二氧化硅 杂化纤维 

分 类 号：TQ342.94[化学工程—化纤工业]