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. 2021 Jul 6;14(14):3786. doi: 10.3390/ma14143786

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Stiffness degradation in sample: (a) SW-26-C-0-R-xx; (b) SW-44-C-0-R-xx; (c) SW-62-C-0-R-xx; (d) DW-26-C-0-R-xx; (e) DW-44-C-0-R-xx; (f) DW-62-C-0-R-xx. Here xx is a crush level (0%; 10%, 20%, and 30%).

Stiffness degradation in sample: (a) SW-26-C-0-R-xx; (b) SW-44-C-0-R-xx; (c) SW-62-C-0-R-xx; (d) DW-26-C-0-R-xx; (e) DW-44-C-0-R-xx; (f) DW-62-C-0-R-xx. Here xx is a crush level (0%; 10%, 20%, and 30%).