【摘要】 用氯化苄为引发剂 ,氯化亚铜为催化剂 ,2 ,2′-联吡啶为配体 ,采用开放体系 ,外加搅拌 ,氮气保护下 ,进行了苯乙烯原子转移自由基溶液聚合 .研究了不同溶剂 ,不同温度 ,不同催化剂和配体比例对聚合的影响 .测定了转化率 ,分子量和分子量分布 ,并对反应进行了动力学研究 ,计算了聚合体系的活性自由基浓度 .结果证明 ,在开放体系下也能较好地实施原子转移自由基聚合 ,得到窄分布的聚合物 .同时还进行了苯乙烯在同样溶剂和温度下的热聚合 ,进一步证实了在上述引发催化体系下的聚合为可控性聚合 .更多还原

【Abstract】 The solution atom transfer radical polymerization(ATRP) of styrene was carried out using benzyl chloride as initiator, cuprous chloride as catalyst, 2,2′ bipyridine as ligand. The influence of solvent, temperature and mole ratio of catalyst to ligand was studied. The monomer conversion, polymer molecular weight and polydispersity at different polymerization time were measured. Thus the kinetic behavior was investigated and the concentration of the active radical was calculated. The results showed that in the open condition, the ATRP of styrene could be well implemented and the polymer with narrow molecular weight distribution could be obtained. On comparison, the pure thermal solution polymerization of styrene was also carreid out in the absence of any initiator. The results confirmed that only with the presence of the above initiator catalyst system, the polymerization could be well controlled.$$$$更多还原