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首次报道以自制氯乙酸降冰片烯甲酯 (NMCA)为引发剂的苯乙烯、甲基丙烯酸甲酯的原子转移自由基(ATRP)本体聚合 .详细考察了单体转化率与反应时间、产物分子量及分子量分布间的关系 .研究发现 ,此引发剂引发甲基丙烯酸甲酯ATRP反应所得聚合物的分子量分布较宽 (PDI=1 80～ 2 4 5 ) ,且实测值 (GPC)与理论值偏差较大 .而NMCA引发的苯乙烯的ATRP反应可得分子量分布较窄 (PDI=1 5 4 )、实验值 (GPC)与理论值基本吻合的产物 .单体转化率随反应时间的变化及产物分子量随单体转化率变化研究证明这一聚合反应具有活性聚合反应特征 .产物的NMR分析证明所合成产物分子中降冰片烯环上双键未参与聚合反应 .
It was reported for the first time the bulk polymerization of atom transfer radical (ATRP) of styrene and methyl methacrylate using norbornene methyl chloroacetate (NMCA) as the initiator.The conversion of monomer and reaction time, the molecular weight And the relationship between molecular weight distribution.The molecular weight distribution of the polymer obtained by this initiator-initiated methyl methacrylate ATRP reaction is wide (PDI = 180 ~ 245), and the deviation of the measured value (GPC) from the theoretical value While the ATRP reaction of styrene induced by NMCA could obtain a product with a narrow molecular weight distribution (PDI = 154) and experimental data (GPC) consistent with the theoretical value.The change of monomer conversion with reaction time and the product The results of molecular weight change with monomer conversion proved that this polymerization reaction has the characteristics of living polymerization.The NMR analysis of the product proved that the double bond of norbornene ring did not participate in the polymerization reaction.