高等学校化学学报2011，Vol.32Issue(6)：1407-1411,5.
丙烯酸酯/液晶复合体系的光聚合动力学
Kinetics of Photopolymerization for the Acrylate/Liquid Crystal Mixture
摘要
Abstract
Photo-differential scanning calorimetry (P-DSC) was used to characterize the photopolymerization kinetics for a mixture of 2-ethylhexyl acrylate ( EHA), trimethylolpropane trimethacrylate (TMPTA) and nematic liquid crystal ( LC, P0616A ) with 2,4,6-trimethylbenzoyldiphenyl phosphine oxide (TPO) as photoiniator at different reaction temperatures ( - 40-80 C ). The results revealed that photopolymerization is faster than the traditional free radical polymerizations, the conversion of the above mixture reaches the plateau in about 50 s, and there are maxima in photopolymerization rate and apparent kinetic constant. Ali final conversion and maximum photopolymerization rate( Rp.max ) increase with the reaction temperature. When the reaction temperature rises to 20 C, the above values increase slightly. In addition, Rp. max decreases with increasing LC content, and the conversion increases slowly with increasing time. Noticeably, the final conversions for the above mixtures have littile difference at different LC contents, and all of them are closed to 80％. With increasing UV intensity, both Rp. max and the final conversion increase obviously, and the threshold value of UV intensity is 4 mW/cm2. However, Rp. max and the final conversion tend to decrease with increasing the average functionality of monomers.关键词
液晶/丙烯酸酯/光差示扫描量热/光聚合动力学Key words
Liquid crystal/ Acrylate/ Photo-differential scanning calorimery (P-DSC)/ Photopolymerization kinetics分类
化学化工引用本文复制引用
史小靖,彭海炎,廖永贵,解孝林..丙烯酸酯/液晶复合体系的光聚合动力学[J].高等学校化学学报,2011,32(6):1407-1411,5.基金项目
国家杰出青年基金(批准号:50825301)资助. （批准号:50825301）
