Vitrimers are a novel class of cross-linked materials containing associative bond exchange properties. Here we demonstrate the preparation of vitrimers with ionic components to investigate the effects of ion-rich domain formation on vitrimer properties. An amorphous polyester that bears COOH side groups was synthesized, and some fraction of COOH was neutralized with Zn²⁺. The residual non-neutralized COOH was reacted with diepoxy cross-linkers, resulting in a network with ester bonds, OH groups, and COOH groups neutralized with Zn²⁺. The sample was further thermally annealed to induce aggregation of Zn²⁺ ionic groups. The aggregated Zn²⁺ groups in the network remained active for trans-esterification-based bond exchange, wherein the degree of ion aggregation can be a factor in tuning the bond-exchange properties. The present study provides some important knowledge on the design of new molecular systems of vitrimers with tunable bond exchange properties.

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结合离聚物概念的聚酯微晶玻璃的设计和基本性能

紫胶是一类新型的含有缔合键交换特性的交联材料。在这里，我们演示了具有离子成分的玻璃化剂的制备，以研究富离子结构域形成对玻璃化剂性能的影响。合成了带有COOH侧基的无定形聚酯，并将部分COOH用Zn ²⁺中和。残留的未中和的COOH与二环氧交联剂反应，形成具有酯键，OH基和被Zn ²⁺中和的COOH基的网络。将样品进一步热退火以诱导Zn ²⁺离子基团的聚集。聚集的Zn ²⁺网络中的基团对于基于酯交换的键交换仍然保持活性，其中离子聚集的程度可能是调节键交换性质的一个因素。本研究提供了有关具有可调键交换特性的新型三聚体分子设计系统的重要知识。