等离子体及过氧化物引发DT聚合动力学  

Kinetics of Degenerative Transfer Polymerization Initiated by Plasma and Peroxide Respectively

作　　者：丁网 施赛杰[1] 李智[1] 沈政[1] 黄健[1] 王晓琳[2] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]清华大学化学工程系,北京100084

出　　处：《塑料》2016年第5期71-74,共4页Plastics

基　　金：国家973计划资助项目(2009CB623404);国家自然科学基金资助项目(20476045)

摘　　要：等离子体引发聚合具有经典自由基聚合不同的特征。文章以碘仿为链转移剂,比较了等离子体及过氧化物引发丙烯酸(AAc)的衰减链转移(DT)聚合动力学。结果表明:碘仿对过氧化物引发体系聚合速率的抑制较等离子体体系明显,同时过氧化物引发DT聚合的分子量更接近于理论值,也更容易在单体转化率较低时得到窄分子量分布(PDI)的聚合物。两种方法引发DT聚合的分子量均与单体转化率呈正比关系,其PDI分别低至1.48、1.64,符合可控/活性聚合的特征。The plasma-initiated polymerization was known showing abnormal polymerization behaviors relative to the classical free radical polymerization. Both kinetics of the degenerative transfer （DT） polymerization initiated by plasma and peroxide were compared on the basis of the transfer agent of iodoform and the monomer of acrylic acid （ AAc）. The retardation effect on polymerization rate caused by the iodoform was more significant in peroxide-initiated polymerization than in plasma-initiated polymerization. Besides, the molecular weights of PAAc prepared by peroxide-initiated DT polymerization was much closer to theoretical values and polymer of narrow molecular weight distributions was synthesized at lower monomer conversions. Nevertheless, the controlled/living polymerization characters including the linear relationship between molecular weights and monomer conversion and narrow polydispersity indexes （ 1.48 and I. 64 respectively） were presented in both DT polymerizations.

关 键 词：等离子体引发聚合 自由基聚合 衰减链转移聚合 可控/活性自由基聚合 聚合动力学 

分 类 号：O631.21[理学—高分子化学]