Polymerization behaviors and polymer branching structures in ATRP of monovinyl and divinyl monomers
Polymerization behaviors and polymer branching structures in ATRP of monovinyl and divinyl monomers
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单乙烯基和二乙烯基单体 ATRP 中的聚合行为和聚合物支化结构
DOI：
10.1039/c3py00338h
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发表时间：
2013-01-01
影响因子：
4.6
通讯作者：
Zhai, Guangqun
中科院分区：
文献类型：
--
作者：
Huang, Wenyan;Yang, Hongjun;Zhai, Guangqun
本文研究了以1，6-双马来酰亚胺己烷（BMIH）、三甘醇二甲基丙烯酸酯（tri-EGDMA）和二乙烯基苯（DVB）为支化剂，单体与支化剂的摩尔比为30/1.0时，苯乙烯原子转移自由基聚合的聚合行为和聚合物支化结构。由于苯乙烯与支化剂之间的相互作用程度不同，它们的聚合行为也有很大差异。BMIH与苯乙烯之间的电荷转移络合物效应导致成核。DVB体系表现出最慢的支化演变，因为苯乙烯和DVB之间没有相互作用。来自相同分子量的Zimm支化因子的支化结构指示剂B（g′ = gb）证明了在三-EGDMA和DVB体系中形成的聚合物是无规支化分子，因为三-EGDMA和DVB在它们的主链中无规分布，而BMIH体系中除了星形分子外，还含有无规支化分子，这是由于支化分子在成核后发生偶联反应所致。
Polymerization behaviors and polymer branching structures in atom transfer radical polymerizations of styrene with 1,6-bismaleimidohexane (BMIH), tri-ethylene glycol dimethacrylate (tri-EGDMA) and divinylbenzene (DVB) as the branching agents have been studied, the mole ratio of monomer to branching agent is 30/1.0. Their polymerization behaviors are quite different because of the different levels of interaction between styrene and the branching agents. The charge transfer complex effect between BMIH and styrene causes core-formation. The DVB system exhibits the slowest evolution of branching because there is no interaction between styrene and DVB. The branching structure indicator b(g′ = gb) from the Zimm branching factor at the same molecular weight proves that polymers formed in the tri-EGDMA and DVB systems are randomly branched molecules because tri-EGDMA and DVB were randomly distributed in their primary chains, while the BMIH system contained randomly branched molecules besides the star-like molecules due to the subsequent coupling reactions between the branched molecules after core-formation.