文献类型：期刊文献

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

作者：Yu, Chengyuan[1,2,3];Lin, Huiyao[1];Li, Le[1];Gu, Ruirui[1];Zhang, Qi[1];Shi, Chenyu[1];Zhang, Chenchen[1];Tong, Fei[1]

机构：[1]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Feringa Nobel Prize Scientist Joint Res Ctr,Sch Ch, Inst Fine Chem,Key Lab Adv Mat & Joint Int Res Lab, Shanghai 200237, Peoples R China;[2]Fujian Normal Univ, Strait Inst Flexible Elect, Fujian Key Lab Flexible Elect, Future Technol, Fuzhou 350117, Peoples R China;[3]Strait Lab Flexible Elect, Fuzhou 350117, Peoples R China

年份：2026

卷号：37

期号：2

外文期刊名：CHINESE CHEMICAL LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001629993600002)】；

基金：This work was supported by the National Natural Science Foun-dation of China (No. 22375063) , Science and Technology Com-mission of Shanghai Municipality (No. 23JC1401700) , and the Fundamental Research Funds for the Central Universities . We thank Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterization. Thanks to Professor Shengtong Sun (Donghua University) for im-portant technical guidance and support in the analysis of the two-dimensional correlation spectra (2DCOS) .

语种：英文

外文关键词：Polydisulfides; Network toughening; Ionic 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. (c) 2025 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.