. 2022 Sep 7;14(18):3740. doi: 10.3390/polym14183740
© 2022 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/).
Figure 11.
Undamaged and damaged specimen images of SP2.