有机过氧化物与二元叔胺引发体系的研究

<正> 过氧化苯甲酰(BPO)引发烯类单体的聚合,可以添加芳叔胺N,N-二甲苯胺、N,N-二甲基对甲苯胺(DMT)促进BPO的分解而提高聚合速度。关于有机过氧化物与多元胺体系的研究,虽然有一些报道,但主要是多元伯胺或仲胺的体系,如异丙苯过氧化氢(CHP)与四亚乙基五胺或与二亚乙基三胺体系。本文采用BPO、LPO(过

STUDIES ON ORGANIC PEROXIDE-DITERTIARY AMINE INITIATION SYSTEMS

Radical polymerization of methyl methacrylate (MMA) initiated with organic pero-xide-ditertiary amine binary systems was studied in this paper. In order to study the effects of organic peroxide and amine respectively, benzoyl peroxide (BPO), lauroyl peroxide (LPO), t-butyl hydroperoxide (TBH), and t-butyl peroxybenzoate (TBPB) were used as organic peroxide component, and aromatic ditertiary amine 4,4'-tetramethyldia-minodiphenylmethane (TMDAPM), and aliphatic ditertiary amine tetramethylethylene-diamine (TMEDA) were used as amine component. It was found that in the bulk poly-merization of MMA using organuc peroxide-TMDAPM binary initiation systems,the ef-fect of organic peroxide on the polymerization rate of MMA R_p was in the following order:BPO>LPO>TBH>TBPB. However,in the organic peroxide-TMEDA binary systems,the order of R_p was LPO-TMEDA>TBH-TMEDA,and BPO-TMEDA,TBPB-TMEDA system could not initiate MMA polymerization. The values of E_a,overall activation energa of polymerization,of MMA initiated with organic peroxide-TMDAPM systems were determined. According to the kinetic studies of MMA polymerization initiated with BPO-TMDAPM,LPO-TMDAPM system,the foll-owing equations were obtained.