Synthesis and characterization of azobenzene-functionalized poly(styrene)-b-poly(vinyl acetate) via the combination of RAFT and “click” chemistry
作者:Xiaoqiang Xue、Jian Zhu、Zhengbiao Zhang、Zhenping Cheng、Yingfeng Tu、Xiulin Zhu
DOI:10.1016/j.polymer.2010.04.052
日期:2010.6
Here, we described a strategy for preparing well-defined block copolymers, poly(styrene)-b-poly(vinyl acetate) (PS-b-PVAc), containing middle azobenzene moiety via the combination of the reversible addition-fragmentation chain transfer (RAFT) polymerization and “click” chemistry. Firstly, a novel RAFT agent containing α-alkyne and azobenzene chromophore in R group, 2-(3-ethynylphenylazophenoxycarb
在这里,我们描述的策略制备定义明确的嵌段共聚物,聚(苯乙烯) - b -聚(乙酸乙烯酯)(PS- b经由可逆加成-断裂链转移的组合-PVAc),含偶氮苯中间部分( RAFT)聚合和“点击”化学反应。首先,合成了一种新型的RFT含α-炔烃和偶氮苯发色团的RAFT试剂2-(3-乙炔基苯基偶氮苯氧基羰基)丙-2-基-9H-咔唑-9-碳二硫代酸酯(EACDT),并用于介导RAFT聚合苯乙烯(St)。获得了定义明确的α-炔基末端官能化聚(苯乙烯)(PS)。其次,使用Z基上具有ω-叠氮化物结构的官能化RAFT试剂O-(2-叠氮基乙基)进行乙酸乙烯酯(VAc)的RAFT聚合。S-苄基二硫代碳酸酯(AEBDC)。获得了定义明确的ω-叠氮化物末端官能化聚乙酸乙烯酯(PVAc)。然后,通过“点击”化学将所得的α-炔基封端的PS与叠氮化物封端的PVAc偶联。获得具有定制结构的嵌段共聚物PS- b - PVAc。通过GPC,1