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| 由4-氰基苄溴引发的苯乙烯电子活化再生原子转移自由基聚合 |
| AGET ATRP of Styrene Using 4-Cyanobenzyl Bromide as the Initiator |
| 投稿时间：2014-12-08 |
| DOI：10.16018/j.cnki.cn32-1650/n.201502002 |
| 中文关键词: 电子活化再生原子转移自由基聚合 苯乙烯 4-氰基苄溴 引发剂 |
| 英文关键词: AGET ATRP Styrene(St) 4-Cyanobenzyl bromide(CBB) Initiator |
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| 中文摘要: |
| 以4-氰基苄溴(CBB)为引发剂、FeCl3·6H2O/PPh3络合体系为催化剂、VC为还原剂实现了对苯乙烯(St)的电子活化再生原子转移自由基聚合(AGET ATRP)。研究表明，聚合过程中单体转化随反应时间增加而线性增长、数均分子量随单体转化率提高而线性增长、得到的聚合物分子量分布指数(PDI)在1.07~1.31之间。为进一步研究取代基团对聚合的影响，选用了4-甲基苄溴(MBB)为引发剂作了对比研究，所得聚合物的结构用核磁氢谱进行了验证。 |
| 英文摘要: |
| 4-Cyanobenzyl bromide was used as the initiator for the atom transfer radical polymerization using activators generated by electron transfer(AGET ATRP)of styrene in a FeCl3·6H2O/PPh3/VC catalytic system. Factors that can affect the AGET ATRP system, such as the reaction temperature and amount of initiator, were discussed. The rates of polymerization exhibited first-order kinetics with respect to the monomer. A linear increase in the number-average molecular weight with increased monomer conversion was observed in the initiation systems. The polydispersity indices of the polymer were relatively low(1. 07~1. 31). To study further the effect of the substituent group of the initiator on polymerization, 4-methylbenzyl bromide was also used as an initiator for the polymerization system. The structures of the polymers were characterized by proton nuclear magnetic resonance spectroscopy. |
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