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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/).
Compressive stress–strain curves of the PU foams prepared from (a) COM and (b) COT. (c) Compressive yield stress of the PU foams made from COM and COT.