Control Viscoelasticity of Polymer Networks with Crosslinks of Superposed Fast and Slow Dynamics

Hao Chen; WenTing Yu; Yi Cao; Zhaozhen Cao; Yebang Tan

doi:10.1002/anie.202105112

journal article Jun 22, 2021

Control Viscoelasticity of Polymer Networks with Crosslinks of Superposed Fast and Slow Dynamics

Hao Chen

WenTing Yu Yi Cao

Zhaozhen Cao Yebang Tan

Angewandte Chemie International Edition Vol. 60 No. 41 pp. 22332-22338 · Wiley

View at Publisher Save 10.1002/anie.202105112

Abstract

AbstractDepending on the dynamics of the crosslinks, polymer networks can have distinct bulk mechanical behaviors, from viscous liquids to tough solids. Here, by means of designing a crosslink with variable molecular dynamics, we show the control of viscoelasticity of polymer networks in a broad range quantitatively. The hexanoate‐isoquinoline@cucurbit[7]uril (HIQ@CB[7]) crosslink exhibits in a combination of protonated and deprotonated states of similar association affinity but distinct molecular dynamics. The molecular property of this crosslink is contributed by linear combination of the parameters at the two states, which is precisely tuned by pH. Using this crosslink, we achieve the quantitative control of viscoelasticity of quasi‐ideal networks in 5 orders of magnitude, and we show the reversible control of mechanical response, such as stiffness, strength and extensibility, of tough random polymer networks. This strategy offers a way to tailor the mechanical properties of polymer networks at the molecular level and paves the way for engineering “smart” responsive materials.

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Details

Published: Jun 22, 2021
Vol/Issue: 60(41)
Pages: 22332-22338
License: View

Authors

H

Hao Chen

School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China; The Key Laboratory of Special Functional Aggregated Materials Ministry of Education Shandong University Jinan 250100 P. R. China

W

WenTing Yu

Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State Microstructure, and Department of Physics Nanjing University Nanjing 210093 P. R. China

Y

Yi Cao

Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State Microstructure, and Department of Physics Nanjing University Nanjing 210093 P. R. China

Z

Zhaozhen Cao

School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China

Y

Yebang Tan

School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China; The Key Laboratory of Special Functional Aggregated Materials Ministry of Education Shandong University Jinan 250100 P. R. China

Funding

National Natural Science Foundation of China Award: 22001149

Natural Science Foundation of Shandong Province Award: ZR2020QB083

Cite This Article

Hao Chen, WenTing Yu, Yi Cao, et al. (2021). Control Viscoelasticity of Polymer Networks with Crosslinks of Superposed Fast and Slow Dynamics. Angewandte Chemie International Edition, 60(41), 22332-22338. https://doi.org/10.1002/anie.202105112

Control Viscoelasticity of Polymer Networks with Crosslinks of Superposed Fast and Slow Dynamics

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