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. 2019 Jan 6;11(1):76. doi: 10.3390/polym11010076

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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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Relative concentration distributions of polymer molecules along the Z direction for (a) the pure PVA/PAM and (b) PVA/PAM/silica composites in the initial (0 ps) and final (300 ps) moments of the friction models.