中文摘要：

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180Pa·s～300Pa·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。

英文摘要：

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.