影像科学与光化学2012，Vol.30Issue(6)：438-446,9.
甲基丙烯酸正丁酯正相微乳液可控/“活性”光聚合动力学研究
Control/Living Free Radical Photopolymerization of n-Butyl Methacrylate in O/W Microemulsion
摘要
Abstract
Using 2-bromo-(2-methyl-l-oxopropoxy)-2-methyl-propio-phenone(HMPP-Br) as a photoinitiator, the controlled/living photopolymerization of w-butyl methacrylate (n-BMA) mediated by 2,2,6, 6-tetramethyl-piperidinyl-l-oxyl (TEMPO) and 2,2,6, 6-tetramethyl-4-piperidinol(TMP) in the microemulsion of n-BMA/n-butanol/SDS-H2O system (O/W) was performed at ambient temperature. The controlling mechanism and reaction kinetics of controlled/living free radical photopolymerization of n-BMA in microemulsion was investigated. It was shown that the monomer conversion increased linearly with the increased exposure time, and the number-average molecular weight (Mn) of Poly(n-BMA) is increased linearly with the monomer conversion increasing under the condition with[TEMPO+TMP]/[HMPP-Br] = l. 1, the content of initiator of 4. 5%(mass fraction) and the irradiation intensity of 5. 5 mW/cm2. The results show that when it was mediated by TEMPO/TMP, the photopolymerization of n-BMA in the microemulsion was to be kineticly controlled. It was found that the plots of number-average molecular weight vs. conversion and In ([M]0/[M]) vs. time were liner respectively, and the n-BMA homopolymers exhibited relatively narrow molecular weight distributions (PDI=1. 25-1. 45), even until the conversion was up. This shows that TEMPO combined with TMP used as a mediator was evidently available.关键词
甲基丙烯酸正丁酯/可控/活性光聚合/2,2,6,6-四甲基哌啶-1-氧自由基/2,2,6,6-四甲基哌啶醇/正相微乳液/动力学Key words
n-butyl methacrylate/O/W microemulsion/controlled/living photopolymerization/2,2,6, 6-tetramethyl-4-piperidinol/2,2,6, 6-tetramethyl-piperidinyl-l-oxyl ( TEMPO)/reaction kinetic分类
化学化工引用本文复制引用
张永涛,姚永平,崔艳艳,董智贤,刘晓暄..甲基丙烯酸正丁酯正相微乳液可控/“活性”光聚合动力学研究[J].影像科学与光化学,2012,30(6):438-446,9.基金项目
国家自然科学基金(20874022) （20874022）
教育部博士点科研基金(20094420110006). （20094420110006）
