摘要
本文以过氧化二碳酸酯BPPD和芳叔胺DHET、DHPT、DMT、DMA组成的引发体系进行MMA聚合的研究。测定了聚合速率R_p,发现添加DHET、DHPT能促进MMA的聚合,缩短诱导期,提高R_p,其效果要比DMT、DMA为好。测定了E_3和聚合速率方程。由ESR谱和端基分析证实DHET、DHPT芳胺组分产生的自由基能引发单体聚合。
The polymerization of methyl methacrylatc (MMA) initiated by bis-2-phenoxyethyl peroxydicarbonate (BPPD) and N, N-di-2-hydroxyethyl-p-toluidine (DHET), N, N-di-2-hydroxypropyl-p-toluidine(DHPT), N,N-dimethyl-p-toluidine(DMT), N,N-dimethyl aniline(DMA) binary systems has been studied. The polymerization rate RP and overall activation energy E1 of polymerization were determined respectively. It was found that the order of Rp for initiation systems was BPPD-DHET≈BPPD-DHPT>BPPD-DMT, while the order of Ea was reversed. The rate equations for MMA polymerization in toluene solution were also determined. An initiation mechanism was proposed based on the results of ESR studies and end group analysis.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1989年第5期506-510,共5页
Chemical Journal of Chinese Universities
关键词
MMA
聚合引发机理
氧化还原引发
Bis-2-phenoxyethyl peroxydicarbonate, N,N-di-2-hydroxyalkyl-_p-to- luiciine, Redox initiation system, MMA polymerization
