. 2021 Sep 28;13(19):3323. doi: 10.3390/polym13193323
© 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/).
Figure 10.
Equal thickness (a) and equal weight (b).