【摘要】 对FeBr3/Me6TREN催化的反向原子转移自由基聚合进行了研究.在不同的催化剂、引发剂的配比、聚合温度和配体用量等条件下,该催化体系催化的MMA聚合反应动力学为一级反应,聚合物分子量可控,分子量分布很窄,说明该体系催化的聚合反应为活性可控聚合.通过实验计算了反应的活化能,并利用UV光谱对催化剂进行了研究.更多还原

【Abstract】 The reverse atom transfer polymerization of MMA catalyzed by FeBr-3/Me-6TREN was studied in this paper. The molecular weight increased with the increase of the conversion and was in a good agreement with the theoretical value. The molecular weight distribution of the resulted PMMA was very narrow(1.06). These results indicate that the polymerization was well-controlled. The effect of morlar ratio of catalyst to initiator and FeBr-3 to ligand Me-6TREN on the control of the polymerization were studied. In addition, the activation energy of polymerization of MMA was calculated to be 29.35 kJ/mol, which was a bit smaller than that of Cl-mediated reverse ATRP.更多还原