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. 2019 Oct 3;11(10):1608. doi: 10.3390/polym11101608

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© 2019 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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(a) ATR-IR spectra of TPU1, TPU2, and TPU1 + TPU2 blends. (b) Carbonyl region (1650–1800 cm⁻¹) of the ATR-IR spectra of TPU1, TPU2, and TPU1 + TPU2 blends.

(a) ATR-IR spectra of TPU1, TPU2, and TPU1 + TPU2 blends. (b) Carbonyl region (1650–1800 cm⁻¹) of the ATR-IR spectra of TPU1, TPU2, and TPU1 + TPU2 blends.