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The positive effect of water on photo-induced step transfer-addition & radical-termination (START) polymerization

机译:水对光诱导的步骤转移加成和自由基终止(START)聚合的积极影响

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Step-growth radical copolymerization between α,ω-diiodoperfluoroalkanes (A) and α,ω-unconjugated dienes (B) proceeds efficiently through a photo-induced Step Transfer-Addition & Radical-Termination (START) strategy in aqueous/organic biphasic system. The addition of water in our polymerization strategy enhanced the overall polymerization efficiency and inhibited the function loss (C–I) significantly, which has been illustrated through UV-vis tests. Therefore, most of the functional groups (C–I) in the polymer chain end have been preserved in the final polymer product (AB)n based on 19F NMR analysis. After polymerization, we could erase the iodine atoms in the main chain of (AB)n, which generates semifluorinated polyolefins with enhanced thermal stability.
机译:α,ω-二碘全氟烷烃(A)和α,ω-非共轭二烯(B)之间的逐步增长自由基共聚通过水/有机​​双相系统中的光诱导逐步转移加成和自由基终止(START)策略有效地进行。在我们的聚合策略中添加水可以提高整体聚合效率,并显着抑制功能损失(C–I),这已通过UV-vis测试证明。因此,聚合物链末端的大多数官能团(C–I)已保留在最终的聚合物产品(AB)中。 n 基于 19 F NMR分析。聚合后,我们可以消除(AB) n 主链中的碘原子,生成具有增强的热稳定性的半氟化聚烯烃。

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