TiO_2改性MQ硅树脂热稳定性的研究  

Study on the thermal stability of TiO_2 modified MQ silicone resin

作　　者：向洪平[1] 葛建芳[1] 郑扬帆[1] 周学廉[1] 

机构地区：[1]仲恺农业工程学院化学化工学院,广东广州510225

出　　处：《仲恺农业工程学院学报》2011年第4期37-40,共4页Journal of Zhongkai University of Agriculture and Engineering

基　　金：仲恺农业工程学院校级科研基金(G3100098);仲恺农业工程学院校级研究生创新基金(H141000)资助项目

摘　　要：以钛酸酯为前躯体,采用溶胶-凝胶法合成了TiO2改性的MQ硅树脂.就前躯体、MQ硅树脂及物料比对改性树脂热稳定性的影响进行了研究.同时,采用傅立叶红外光谱(Fourier Transform Infrared Spectrometer,FT-IR)对材料的分子结构进行了表征,采用热重分析(Thermogravimetric Aanlysis,TGA)对材料的热稳定性能进行了测试,采用扫描电镜(Scanning Electron Microscope,SEM)对材料的表面形貌进行了扫描.结果表明,TiO2改性MQ硅树脂体系中存在Ti-O-Si共价键;当m(钛酸异丙酯)∶m(MQ硅树脂)=3∶5时,改性树脂的热稳定性最佳;改性树脂粒子颗粒大小约为100 nm左右.TiO2 modified MQ silicone resin had been synthesized by means of sol-gel process with titanate as the precursor of titania. The effects of precursor, MQ silicone resin and material ratio on the thermal stability of modified resin were investigated. The molecular structure, thermal stability and surface topography of the modified resin were characterized and analyzed by FT-IR, TGA, SEM, respectively. The results showed that Ti-O-Si covalent bond had been formed in the TiO2 modified MQ silicone resin. The modified resin had the optimal thermal stability with the tetraisopropyl titanate as the precursor, When the weight ratio of tetraisopropyl titanate to MQ silicone resin was 3： 5. The modified resin possessed a homogeneously distributed particle size which was around 100nm.

关 键 词：TIO2 改性MQ硅树脂 热稳定性 

分 类 号：TQ32[化学工程—合成树脂塑料工业]