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以二硫代苯甲酸苄酯(BDTB)为链转移剂,偶氮二异丁腈(AIBN)为引发剂,丙烯酰胺基偶氮苯(AAAB)为单体,DMF为溶剂,利用可逆加成-断裂链转移(RAFT)聚合法合成了聚丙烯酰胺基偶氮苯(PAAAB),并考察了聚合温度和链转移剂浓度对聚合反应的影响。通过FT-IR、1 H-NMR、GPC等对链转移剂和聚合物结构进行了表征。结果表明:聚合反应动力学曲线呈良好的线性关系,分子量分布窄;随着[BDTB]/[AIBN]比例的增大,聚合速率和分子量下降,分子量分布变窄。
Using benzyl dimethyl dithiobenzoate (BDTB) as chain transfer agent, azobisisobutyronitrile (AIBN) as initiator, acrylamidoazobenzene (AAAB) as monomer and DMF as solvent, Polyacrylamide azobenzene (PAAAB) was synthesized by chain extension (RAFT) polymerization. The effect of polymerization temperature and chain transfer agent concentration on the polymerization was investigated. Chain transfer agents and polymer structures were characterized by FT-IR, 1 H-NMR, GPC and the like. The results showed that the kinetic curve of polymerization showed a good linear relationship with narrow molecular weight distribution. As the ratio of [BDTB] / [AIBN] increased, the polymerization rate and molecular weight decreased and the molecular weight distribution became narrower.