Bolstering the Mechanical Robustness of Supramolecular Polymer Network by Mechanical Bond

Yuan-Hao Wang ¹Jing-Xi Deng ¹Jun Zhao ¹Yi Ding ¹Li Yang ¹Zhao-Ming Zhang ¹Xu-Zhou Yan²

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作者信息

1. School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China
2. School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai200240,China;Frontiers Science Center for Transformative Molecules,Shanghai Jiao Tong University,Shanghai 200240,China
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Abstract

Supramolecular polymer networks(SPNs)are celebrated for their dynamic nature,yet they often exhibit inadequate mechanical pro-perties.Thus far,the quest to bolster the mechanical resilience of SPNs while preserving their dynamic character presents a formidable challenge.Herein,we introduce[2]rotaxane into SPN to serve as another cross-link,which could effectively enhance the mechanical robustness of the poly-mer network without losing the dynamic properties.Compared with SPN,the dually cross-linked network(DPN)demonstrates superior breaking strength,Young's modulus,puncture force and toughness,underscoring its superior robustness.Furthermore,the cyclic tensile tests reveal that the energy dissipation capacity of DPN rivals,and in some cases surpasses,that of SPN,owing to the efficient energy dissipation pathway facilitat-ed by[2]rotaxane.In addition,benefiting from stable topological structure of[2]rotaxane,DPN exhibits accelerated recovery from deformation,indicating superior elasticity compared to SPN.This strategy elevates the performance of SPNs across multiple metrics,presenting a promising avenue for the development of high-performance dynamic materials.

Key words

Rotaxane cross-links/Dually cross-linked network/Supramolecular polymer network/Host-guest recognition/Dynamic materials

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基金项目

National Natural Science Foundation of China(22122105)

National Natural Science Foundation of China(22071152)

Natural Science Foundation of Shanghai(22dz1207603)

Shuguang Program of Shanghai Education Development Foundation()

Shanghai Municipal Education Commission(22SG11)

Starry Night Science Fund of Zhejiang University Shanghai Institute for Advanced Study(SN-ZJU-SIAS-006)

National Natural Science Foundation of China(22305150)

National Natural Science Foundation of China(22101175)

National Natural Science Foundation of China(52333001)

State Key Laboratory of Polyolefins and Catalysis and Shanghai Key Laboratory of Catalysis Technology for Polyolefins(SKL-LCTP-202301)

出版年

2024

高分子科学(英文版)

中国化学会　中国科学院化学研究所

高分子科学(英文版)

CSTPCDCSCD

影响因子：0.721

ISSN：0256-7679

参考文献量51

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