. 2025 Jul 27;17(15):2051. doi: 10.3390/polym17152051
© 2025 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 14.
Waste polyurethane molecular chain [51].