One-Pot Synthesis of Alternating (Ultra-High Molecular Weight) Multiblock Copolymers via a Combination of Anionic Polymerization and Polycondensation,Macromolecular Rapid Communications

当前位置： X-MOL 学术 › Macromol. Rapid Commun. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

One-Pot Synthesis of Alternating (Ultra-High Molecular Weight) Multiblock Copolymers via a Combination of Anionic Polymerization and Polycondensation
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2021-09-15 , DOI: 10.1002/marc.202100448
Matthias Heck ₁ , Carlo Botha ₁ , Manfred Wilhelm ₁ , Valerian Hirschberg ₁

Affiliation

This article presents a fast, straightforward synthesis approach to polymerize alternating multiblock copolymers, ultra-high molecular weight (UHMW) (homo)polymers as well as precursors for complex macromolecular topologies such as comb or barbwire architectures. The one-pot synthesis strategy proposed in this work is based on anionic polymerization via a bifunctional initiator and the subsequent linking of macro dianions with a bifunctional linker, additionally overcoming the limitations associated with the monomer reactivity. Thus, the synthetic route guarantees the repeating size of polymer blocks and an equal distribution of functional groups in precursors for complex topologies. Dianions of polystyrene (PS), polyisoprene-b-polystyrene-b-polyisoprene, and poly-2-vinylpyridine-b-polystyrene-b-poly-2-vinylpyridine are linked with

α, α^{'}

-dibromo-para-xylene to UHMW and multiblock copolymers. Multiblock copolymers with on average up to 50 well-defined alternating A and B blocks are accessible within 15 min.

中文翻译：

通过阴离子聚合和缩聚的组合一锅法合成交替（超高分子量）多嵌段共聚物

本文介绍了一种快速、直接的合成方法，用于聚合交替多嵌段共聚物、超高分子量 (UHMW)（均）聚合物以及复杂大分子拓扑结构（如梳状或倒钩线结构）的前体。这项工作中提出的一锅法合成策略基于通过双功能引发剂进行的阴离子聚合以及随后将大二价阴离子与双功能接头连接，另外克服了与单体反应性相关的限制。因此，合成路线保证了聚合物嵌段的重复大小和复杂拓扑前体中官能团的均匀分布。聚苯乙烯 (PS)、聚异戊二烯-b-聚苯乙烯-b-聚异戊二烯和聚-2-乙烯基吡啶-的二价阴离子b-聚苯乙烯- b-聚-2-乙烯基吡啶与