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. 2021 Sep 16;13(18):3120. doi: 10.3390/polym13183120

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© 2021 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/).

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(a) The filtration loss (FL_API) of BF with different PADAD concentrations before and after aging at 160 °C for 16 h. (b) The filtration loss (FL_API) of BF with different PADAD concentrations in the presence of NaCl or CaCl₂.