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. 2021 Jan 18;14(2):446. doi: 10.3390/ma14020446

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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 (http://creativecommons.org/licenses/by/4.0/).

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Photograph of permanently deformed specimen after compressive test for (a) PIF at 20 °C, (b) CGR-PIF at 20 °C, (c) PIF at −163 °C, and (d) CGR-PIF at −163 °C.

Photograph of permanently deformed specimen after compressive test for (a) PIF at 20 °C, (b) CGR-PIF at 20 °C, (c) PIF at −163 °C, and (d) CGR-PIF at −163 °C.