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有机过氧化物引发烯类单体的聚合,可以加入芳叔胺促进过氧化物的分解,提高聚合速度。其中最常用的芳叔胺有N,N-二甲苯胺(DMA)、N,N-二甲基对甲苯胺(DMT),本文采用过氧化二苯甲酰(BPO)、过氧化二月桂酰(LPO)、叔丁基过氧化氢(TBH)和过氧化苯甲酸叔丁酯(TBPB)四种过氧化物为引发剂进行甲基丙烯酸甲酯(MMA)的本体聚合,测得其聚合速度R_p的顺序为LPO>BPO>TBH>TBPB,但在添加芳叔胺DMT或脂环叔胺N-乙基哌啶(NEP)时,则聚合速度的顺序变为BPO-胺>LPO-胺>TBH-胺>TBPB-胺。添加这两种叔胺虽然都能促进聚合,但只对BPO引发剂有显著的影响,研究结果如下:
Organic peroxides lead to the polymerization of vinyl monomers, aromatic tertiary amine can be added to promote the decomposition of peroxide to improve the polymerization rate. The most commonly used aromatic tertiary amines are N, N-dimethylaniline (DMA) and N, N-dimethyl p-toluidine (DMT). In this paper, dibenzoylperoxide The polymerization of methyl methacrylate (MMA) was carried out by using four kinds of peroxides (LPO, TBH and TBPB) as initiators. The polymerization rate The order of R_p is LPO> BPO> TBH> TBPB, but when an aromatic tertiary amine DMT or an alicyclic tertiary amine N-ethylpiperidine (NEP) is added, the order of the polymerization rates becomes BPO-amine> LPO-amine> TBH-amine> TBPB-amine. Although these two tertiary amines can promote the polymerization, but only have a significant impact on the BPO initiator, the results of the study are as follows: