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N-乙烯基咔唑(NVC)具有大的共轭结构和中间有一个杂原子氮,而容易与其它试剂反应,形成自由基、阳离子和电荷转移络合物,故是一种活性较高的单体,1970年有人发现NVC与N-C_4H_9NCl_2一起可以引发甲基丙烯酸甲酯(MMA)聚合,此外,文献报道了电子给体如胺与CCl_4体系在二甲亚砜(DMSO)中引发MMA聚合,本文研究了NVC与几种卤代烃所组成的双组分体系对MMA的引发聚合反应;该体系的引发活性和组成与分子量及分子量分布的关系;并探讨了反应机理。
N-vinylcarbazole (NVC) has a large conjugated structure with a heteroatomic nitrogen in the middle, which readily reacts with other reagents to form free radicals, cations and charge-transfer complexes and is therefore a more active Monomer, it was found in 1970 that NVC together with N-C_4H_9NCl_2 can initiate the polymerization of methyl methacrylate (MMA). In addition, it has been reported in the literature that the initiation of MMA polymerization in dimethylsulfoxide (DMSO) by electron donor such as amine and CCl_4 system In this paper, the polymerization reaction of MMA initiated by two component system consisting of NVC and several halogenated hydrocarbons was investigated. The relationship between initiator activity and composition, molecular weight and molecular weight distribution of the system was also discussed. The reaction mechanism was also discussed.