A CTA-shuttled R-group approach: a versatile synthetic tool towards well-defined functional cylindrical polymer brushes via RAFT polymerizationw
A CTA-shuttled R-group approach: a versatile synthetic tool towards well-defined functional cylindrical polymer brushes via RAFT polymerizationw
复制标题
CTA 穿梭 R 基团方法：一种多功能合成工具，通过 RAFT 聚合形成明确的功能性圆柱形聚合物刷
DOI：
10.1039/c7py00167c
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发表时间：
2017
影响因子：
4.6
通讯作者：
Ling Jun
中科院分区：
文献类型：
--
作者：
Wang Yifei;Zheng Zhicheng;Huang Zhengdong;Ling Jun
通过4-乙烯基苄基乙酸酯(VBA)的可逆加成-断裂链转移(RAFT)聚合，再经三步修饰，合成了一种理论聚合度(DP)高达1200且具有窄多分散性的含链转移剂(CTA)侧基的聚合物主链(PolyCTA)。以聚CTA为原料，通过“CTA穿梭”RAFT聚合，合成了具有聚苯乙烯侧链的圆柱形聚合物刷。此外，本文还对CPB上的各种后功能化进行了研究，以展示构建复杂体系结构的潜力。通过N-异丙基丙烯酰胺的直接扩链、一锅氨解和Michael加成反应，分别与含叔丁氧基甲酰基(Boc)保护胺的丙烯酸酯或聚乙二醇单甲酯反应，成功地合成了具有聚苯乙烯-b-聚(N-异丙基丙烯酰胺)侧链、端胺基聚苯乙烯侧链和聚苯乙烯-b-聚乙二醇侧链的CPBS。“CTA穿梭”的R-基团RAFT聚合和后官能化策略在制备定制的多氯联苯方面表现出了多功能性。
We report a new synthetic route of a polymer backbone (polyCTA) containing chain transfer agent (CTA) pendent groups with a theoretical degree of polymerization (DP) up to 1200 and narrow polydispersity through reversible addition–fragmentation chain transfer (RAFT) polymerization of 4-vinylbenzyl acetate (VBA) followed by three modification steps. Well-defined cylindrical polymer brushes (CPBs) with polystyrene side chains are synthesized from the polyCTA via “CTA-shuttled” RAFT polymerization to prove the feasibility. Furthermore, various post-functionalizations on CPBs are investigated to demonstrate the potential of building complex architectures. CPBs with polystyrene-b-poly(N-isopropylacrylamide) side chains, amine-terminated polystyrene side chains and polystyrene-b-poly(ethylene glycol) side chains are synthesized successfully by the direct chain extension of N-isopropylacrylamide, one-pot aminolysis and Michael addition using acrylates containing a tert-butoxy carbonyl (Boc) protected amine group or mono-methyl poly(ethylene glycol), respectively. The strategy of “CTA-shuttled” R-group approach RAFT polymerization along with post-functionalization exhibits versatility in preparing tailor-made CPBs.