文献类型：期刊文献

中文题名：Ion-cluster-optimized microphase separation in shape-memory polydisulfides for enhanced mechanical performance

作者：Chengyuan Yu[1,2];Huiyao Lin[1];Le Li[1];Ruirui Gu[1];Qi Zhang[1];Chenyu Shi[1];Chenchen Zhang[1];Fei Tong[1]

机构：[1]Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering,Feringa Nobel Prize Scientist Joint Research Center,Frontiers Science Center for Materiobiology and Dynamic Chemistry,Institute of Fine Chemicals,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China;[2]Strait Institute of Flexible Electronics(SIFE,Future Technologies),Fujian Key Laboratory of Flexible Electronics,Fujian Normal University and Strait Laboratory of Flexible Electronics(SLoFE),Fuzhou 350117,China

年份：2026

卷号：37

期号：2

起止页码：494

中文期刊名：Chinese Chemical Letters

外文期刊名：中国化学快报(英文版)

基金：supported by the National Natural Science Foundation of China(No.22375063);Science and Technology Commission of Shanghai Municipality(No.23JC1401700);the Fundamental Research Funds for the Central Universities.

语种：英文

中文关键词：Polydisulfides;Network toughening;lonic clusters;Microphase separation;Shape-memory supramolecular polymers

摘要：Developing advanced polymeric materials with enhanced mechanical properties and functionalities has been a long-standing goal in materials science.Recently,supramolecular polymeric materials (SPMs) have drawn increased attention due to their unique properties and potential applications in self-healing,shape memory,sensors,and flexible electronics.Here,we develop an ionic cluster-optimized microphase separation strategy to enhance the toughening and energy dissipation capabilities of polydisulfide-based supramolecular polymers.The mechanical properties,including Young’s modulus and toughness,are significantly improved by integrating the quadruple H-bonding 2-ureido-4-pyrimidone (UPy) induced microphase separation with iron(Ⅲ)-to-carboxylate ionic clusters.By combining established chemical approaches with adjustable polymer phase ratios,it is revealed that the synergistic effect of these factors expands the interchain spacing,facilitates the formation of microphase domains,and enhances the tolerance of polythioctic acid-based polymers to external mechanical and thermal stimuli,meeting the practical requirements for industrial plastic applications.Moreover,the UPy-functionalized polymers incorporating iron carboxylate clusters exhibit good one-way shape memory behavior with practical applicability at a relatively low recovery temperature.Our work demonstrates a novel strategy for constructing industrially viable shape memory dynamic SPMs and paves the way for future innovations in developing SPMs.