Untangling the mechanics of entanglement in slide-ring gel towards both super-deformability and toughness

Xing, Ziyu, Shu, Dong-Wei, Lu, Haibao and Fu, Yong Qing (2022) Untangling the mechanics of entanglement in slide-ring gel towards both super-deformability and toughness. Soft Matter, 18 (6). pp. 1302-1309. ISSN 1744-683X

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Official URL: https://doi.org/10.1039/D1SM01737C


Entanglement plays a critical role in determining dynamic properties of polymer systems, e.g., resulting in slip links and pulley effects for achieving their large deformation and high strength. Although it has been studied for decades, the mechanics of entanglement for stiffness-toughness conflict is not well understood. In this study, a topological knot theory incorporating an extended tube model is proposed to understand the entanglements in slide-ring (SR) gel, which slips over a long distance to achieve large deformation and high toughness via the pulley effect. Based on the topological knot theory, the sliding behavior and pulley effect of entanglement among molecular chains and cross-linked rings are thoroughly investigated. Based on the rubber elastic theory, a free-energy function is formulated to describe mechanical toughening and slipping of topological knots, while the SR gel retains the same binding energy. Finally, effectiveness of the proposed model is verified using both finite element analysis and experimental results reported in literature.

Item Type: Article
Additional Information: This work is supported by National Natural Science Foundation of China (NSFC) under Grant No. 11672342 and 11725208, and the Newton Mobility Grant (IE161019) through the UK Royal Society and NFSC.
Subjects: H600 Electronic and Electrical Engineering
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Rachel Branson
Date Deposited: 10 Jan 2022 16:37
Last Modified: 10 Jan 2023 08:00
URI: https://nrl.northumbria.ac.uk/id/eprint/48122

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