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. 2019 Sep 12;11(9):1489. doi: 10.3390/polym11091489

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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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Attenuated Total Reflection-FTIR spectra of virgin, photo-oxidized, soil-buried, and photo-oxidized + buried (a) T1 and (b) T2 samples. T1 = Mater Bi^®-based pipes, and T2 = Bio-Flex^®-based pipes.