Pyridine Isomer Effects in the Framework of Phase-Separated Vitrimer-Like Materials Operated with Trans-N-Alkylation Bond Exchange of Quaternized Pyridines

IF 2.5 4区 化学 Q3 POLYMER SCIENCE
Maho Suzuki, Mikihiro Hayashi
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Abstract

Pyridine groups are known to form various types of bonds, including hydrogen, ionic, and coordination bonds. Another distinctive feature of pyridine groups is the presence of structural isomers. The effects of pyridine isomers have been investigated, particularly for ortho- and para-substituted pyridines, in relation to their bond formation abilities and interaction energies, which ultimately influence macroscopic physical properties. In this study, the effects of pyridine isomers on the formation of quaternization bonds are newly explored, based on the original design of vitrimer-like materials. The polymer component is a poly(acrylate) random copolymer containing ortho-, meta-, and para-substituted pyridine side groups, which are cross-linked by diiodo molecules through pyridine quaternization bonds. The quaternized pyridines self-aggregate into nano-domains, and bond exchange occurs via trans-N-alkylation in an inter-domain manner. The differences in bond formation and related physical properties of samples with three distinct pyridine isomers, including creep and stress relaxation behaviors of the vitrimer-like materials are investigated. Overall, this study offers new insights into the pyridine isomer effects and provides a fresh perspective for tuning the physical properties of bond-exchangeable materials.

季铵盐化吡啶反式n -烷基化键交换在相分离的类玻璃聚合物框架下的吡啶异构体效应
已知吡啶基团可以形成各种类型的键,包括氢键、离子键和配位键。吡啶基团的另一个显著特征是结构异构体的存在。吡啶异构体的影响,特别是对邻位和对取代吡啶的影响,研究了它们的成键能力和相互作用能,最终影响宏观物理性质。本研究在原设计的类玻璃体材料的基础上,对吡啶异构体对季铵化键形成的影响进行了新的探索。聚合物组分是一种聚(丙烯酸酯)无规共聚物,含有邻位、间位和对取代吡啶侧基,它们通过吡啶季铵化键由二碘分子交联。季铵化吡啶自聚集成纳米畴,并通过反式n -烷基化在畴间进行键交换。研究了具有三种不同吡啶异构体的样品在键形成和相关物理性质上的差异,包括类玻璃聚合物材料的蠕变和应力松弛行为。总的来说,本研究为吡啶异构体效应提供了新的见解,并为调整键交换材料的物理性质提供了新的视角。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Macromolecular Chemistry and Physics
Macromolecular Chemistry and Physics 化学-高分子科学
CiteScore
4.30
自引率
4.00%
发文量
278
审稿时长
1.4 months
期刊介绍: Macromolecular Chemistry and Physics publishes in all areas of polymer science - from chemistry, physical chemistry, and physics of polymers to polymers in materials science. Beside an attractive mixture of high-quality Full Papers, Trends, and Highlights, the journal offers a unique article type dedicated to young scientists – Talent.
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