有机过氧化氢物与芳叔胺体系引发甲基丙烯酸甲酯聚合的研究

以有机过氧化氢物叔丁基过氧化氢(TBH)或异丙苯过氧化氢(CHP)与芳叔胺N,N-二甲基苯胺(DMA)或其衍生物组成的体系引发甲基丙烯酸甲酯(MMA)聚合。研究有机过氧化氢物与芳叔胺结构对聚合的影响,测定了TBH-胺与CHP-胺体系引发MMA聚合的总活化能分别为50-57KJ/mol与39-62KJ/mol,并对CHP-DMT(N,N-二甲基对甲苯胺)引发MMA聚合动力学以及有关引发聚合机理进行了研究。

STUDIES ON THE POLYMERIZATION OF METHYL METHACRYLATE'INITIATED WITH ORGANIC HYDROPEROXIDE-AMINE SYSTEMS

Radical polymerization of methyl methacrylate (MMA) initiated with organic hydroperoxide-amine systems was studied. t-Butyl hydroper-oxide (TBH) and cumene hydroperoxide (CHP) were used as organic hydroperoxide components, aromatic tertiary amines such as N,N-di-methyl aniline (DMA)and its p-substitued derivatives i.e. N,N-dimeth-yl-p-toluidine (DMT) ,p-nitro-N,N-dimethyl aniline (NDMA) and p-di-methylamino benzaldehyde (DMAB) were used as amine components. It was found that, the different amine structures show little effect on the Rp of MMAboth in TBH-amine or CHP-amine system. So the values of RPare not so difference whether the substituents are electron-donating groups or electron-withdrawing groups. The values of overall activation energy Ea of MMApolymerization initiated with TBH-amine and CHP-amine were determined in the range of 50-57 KJ/mole for TBH-amine systems and 39-62 KJ/mole for CHP-amine systems respectively. Furthermore, the reaction mechanism and kinetics of polymerization of MMAinitiated with ROOH-DMTsystem were studied and discussed.