N-(对甲苯基)马来酰亚胺的自由自聚合与光敏诱导聚合及共聚合

POLYMERIZATION AND COPOLYMERIZATION OF N-(PARA-METHYLPHENYL) MALEIMIDE INITIATED BY N,N- DIMETHYL-PARA-TOLUIDINE UNDER UV LIGHT IRRADIATION

N-烷基与N-芳基马来酰亚胺,是属于1,2-二取代乙烯结构的单体,文献[1—3]报道这类单体能进行自由基聚合与共聚合。但对于N-(对甲苯基)马来酰亚胺(PMPMI)的自由基聚合与共聚合中,溶剂对聚合物分子量的影响尚未有详细报道。至于N-烷基与N-芳基马来酰亚胺分别和丙烯酸甲酯(MA)、甲基丙烯酸甲酯(MMA)的共聚合也有一些报道,由竞聚率的测定,计算出N-芳基马来酰亚胶的e值是2.12—2.29和1.35—1.75。表明N-芳基马来酰亚胺是一缺电子的单体,即负性单体。我们研究室曾报道N,N-二甲基-对甲苯胺(DMT)和其它芳胺能光诱导引发负性单体丙烯腈聚合。PMP-

N-(p-methylphenyl) maleimide (PMPMI) was synthesized from the reaction of maleic anhydride with p-methylaniline via two steps processes. Radical polymerization of PMPMI using AIBN as an initiator or initiated with N,N-dimethyl-p-toluidine (DMT) under UV light irradiation have been investigated. Copolymerizations of methyl acrylate (MA), methyl me-thacrylate (MMA) with PMPMI were carried out in THF and cyclohexanone respectively. It was found that the molecular weights of the polymers and copolymers obtained from the cyclo hexanone were always greater than that of from THF. The monomer reactivity ratios were calculated.