Controlled polymerization of carbazole-based vinyl and methacrylate monomers at ambient temperature: A comparative study through ATRP, SET, and SET-RAFT polymerizations
作者:Neelamegan Haridharan、Raghavachari Dhamodharan
DOI:10.1002/pola.24518
日期:2011.2.15
by high‐temperature ATRP while ambient temperature SET‐RAFT polymerization was relatively slow and controlled. In the case of CMA, SET‐RAFT is found to be more suitable for the ambient temperature polymerization. The polymerization rate followed first order kinetics with respect to monomer conversion and the molecular weight of the polymer increased linearly with conversion. The controlled nature of
的聚合Ñ乙烯咔(NVK)和咔唑酯(CMA)进行了使用受控的自由基聚合的方法,例如原子转移自由基聚合(ATRP),单电子转移(SET)-LRP,和单电子转移起始,接着可逆附加碎片链转移(SET‐RAFT)。良好控制的聚合反应,分子量分布窄(M w / M n)对于NVK,通过高温ATRP达到<1.25,而环境温度SET-RAFT聚合则相对较慢且可控。对于CMA,发现SET‐RAFT更适合于环境温度聚合。相对于单体转化率,聚合速率遵循一级动力学,并且聚合物的分子量随转化率线性增加。通过使用新的基于黄烷酮的甲基丙烯酸酯(FMA)作为第二单体,由PNVK和PCMA大分子引发剂合成二嵌段共聚物,进一步证明了聚合反应的受控性质。所有聚合物均显示出荧光。PNVK和PCMA均聚物中的准分子带非常宽,这可能归因于咔唑-咔唑的重叠相互作用。嵌段共聚物的扫描电子显微镜分析揭示了有趣的形态特征。©2010 Wiley