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. 2021 Mar 26;13(7):1047. doi: 10.3390/polym13071047

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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 (http://creativecommons.org/licenses/by/4.0/).

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(a) View of micro-compounder with different valves and channels; (b) the schematic representation of a twin-screw extruder for the melt mixing of CNT-reinforced nanocomposites. Adapted from [81,85].