紫外光固化聚合物/SiO2纳米复合涂层的制备与结构关系研究
Preparation and Microstructure of UV-curable Polymer/Silica Nanocomposite Coats
本文以四乙氧基硅烷（TEOS）为前驱体，采用先水解再与低聚物和活性单体共混（即共混法）或先与环氧丙烯酸酯（EA）混合、水解，再与活性单体混合（即原位法）的方法制备了紫外光固化纳米复合材料，并借助Si核磁（29Si NMR）、透射电子显微镜（TEM）、差热分析（DSC）和傅立叶红外（FTIR）分析了其结构和UV固化动力学。研究表明在共混法纳米复合涂层中TEOS能水解缩合生成纳米二氧化硅粒子，对有机链段运动束缚较强，导致较高Tg，而原位法中纳米复合涂层中TEOS 只是部分水解缩合生成一种与有机相缠结的无机相结构，Tg较低，但均高于纯聚合物涂层的Tg。另外，原位法纳米复合涂料的UV固化速度高于共混法。甲基丙烯酰氧基丙基三甲氧基硅烷（MPS）的存在导致UV固化速度轻微增加，但对Tg没有明显影响。
he UV-curable nanocomposites were prepared by blending or in situ method, with nanosilica obtained from sol-gel process. The microstructure and UV curing kinetics of the nanocomposite coats were investigated using 29Si CP MAS NMR, TEM, DSC and FTIR, respectively. The NMR and TEM showed that for the samples by blending method, TEOS could completely hydrolyze and condensate to form nanosilica particles, but for the samples by in situ method, TEOS could not hydrolyze and condensate completely and tended to form the inorganic phases interpenetrating with organic molecules. DSC measurements showed that blending method caused higher glass transition temperatures than in situ method. FTIR analysis indicated that the nanocomposites prepared from in situ method had much higher curing rates than those from blending method.
李富生、周树学、武利民
涂料工业高分子化合物工业
纳米复合材料、UV固化、纳米二氧化硅
nanocomposites UV-curable coatings nanosilica
李富生,周树学,武利民.紫外光固化聚合物/SiO2纳米复合涂层的制备与结构关系研究[EB/OL].(2005-12-09)[2025-08-04].http://www.paper.edu.cn/releasepaper/content/200512-214.点此复制
评论