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Dual roles of 4-N,N-dimethylaminostyrene as both catalyst and monomer in reversible complexation mediated polymerization for the synthesis of functional polystyrene and polystyrene-block-polyisoprene-block-polystyrene
European Polymer Journal ( IF 5.8 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.eurpolymj.2020.110095
Faliang Luo , Juntao Ren , Chunyu Li , Yanming Hu , Guangyuan Zhou

Abstract A styrene derivative, 4-N,N-dimethylaminostyrene (MAS), serving as both catalyst and monomer was exploited in reversible complexation mediated polymerization (RCMP). Radical trap experiment and UV–vis spectroscopy analysis revealed that MAS as a catalyst could abstract iodine from iodine-containing compound to generate propagating radical species. Kinetic studies demonstrated that the polymerization of styrene in the presence of MAS proceeded in a “living”/controlled manner, affording polymers with controlled molecular weights and narrow molecular weight distributions. The livingness of the obtained polymer was confirmed by chain extension. Determined by water contact angle measurement, incorporation of MAS into the polymer led to the enhancement of surface energy. Moreover, using α,ω-bis(2-iodo-2-phenylacetoxy)-end functionalized cis-1,4-polyisoprene as a macroinitiator which was synthesized through cross-metathesis of cis-1,4-polyisoprene with cis-1, 4-bis(2-iodo-2-phenylacetoxy)-2-butene, the polymerization of styrene in the presence of MAS also exhibited typical features of “living”/controlled radical polymerization to yield polystyrene-block-polyisoprene-block-polystyrene.

中文翻译:

4-N,N-二甲氨基苯乙烯在可逆络合介导聚合反应中作为催化剂和单体的双重作用,用于合成功能性聚苯乙烯和聚苯乙烯-嵌段-聚异戊二烯-嵌段-聚苯乙烯

摘要 苯乙烯衍生物 4-N,N-二甲氨基苯乙烯 (MAS) 作为催化剂和单体被开发用于可逆络合介导聚合 (RCMP)。自由基阱实验和紫外-可见光谱分析表明,MAS 作为催化剂可以从含碘化合物中提取碘以产生传播的自由基物种。动力学研究表明,在 MAS 存在下,苯乙烯的聚合以“活性”/受控方式进行,提供具有受控分子量和窄分子量分布的聚合物。通过扩链确认所得聚合物的活性。通过水接触角测量确定,将 MAS 掺入聚合物导致表面能的增强。此外,使用α,ω-双(2-碘-2-苯基乙酰氧基)-末端官能化的顺-1,
更新日期:2020-12-01
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