纸质出版日期:1990-4-20
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本文对铈离子与苯基氨基甲酸酯类化合物在H2O-CH3CN(3∶1,V/V)及H2O-HCONH2(1∶2,V/V)两种介质中引发丙烯酰胺的聚合进行了研究。考察了不同结构的苯基氨基甲酸酯对聚合的影响。苯基氨基甲酸酯类化合物对铈离子引发聚合均有促进作用,其中对-甲苯基氨基甲酸酯的促进作用最为显著。测定了聚合反应表现活化能及聚合动力学方程,并提出了聚合反应机理。
The Kinetics of polymerization of acrylamide (AAM) initiated by eerie ion-alkyl phenylcarbamate and eerie ion-alkyl 4-methylphenylcarbamate redox systems in the temperature rang of 20-40℃ has been investigated. It was found that eeric ion coupled with alkyl 4-methylphenylcarbamate was a very effective initiating system for the polymerization of AAM. The overall activation energy of polymerization and the rate equations of polymerization were determined. A initiation mechanism involving the formation of a complex between Ce4+ and alkyl phenylcarbamate whose decomposition yields the initiating free radical has been sugested.
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