RADICAL POLYMERIZATION OF METHYL METHACRYLATE IN THE PRESENCE OF N-HYDROXYETHYL-N-METHYL-PARA-TOLUIDINE
N-甲基-N-(2-羟乙基)-对-甲苯胺存在下甲基丙烯酸甲酯的自由基聚合

The polymerization of methyl methacrylate(MMA) in the presence of N-hydroxyethyl-N-methyl-para-toluidine(HMT) initiated with organic peroxide, such as benzoyl peroxide (BPO), lauroyl peroxide(LPO), has been studied. It was found that HMT can increase the rate of polymerization Rp and decrease the overall activation energy of polymerization E,. The values of E0 reduced from 85.8 KJ/mol using BPO alone to 41.3 KJ/mol using BPO/HMT as initiator. The rate equations of MMA polymerization were determined as follows:Rp=KBPO]0.48HMT]0.48MMA]1.02Rp =KLPO]0.47HMT]0.46MMA]0.98It fits well to the equation of polymerization with redox initiation system. UV spectrum end group analysis of polymer obtained revealed the presence of HMT moiety in the end group. Accordingly, the radicals derived from aromatic amine will initiate monomer to polymerize.