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. 2022 Jan 27;14(3):510. doi: 10.3390/polym14030510

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© 2022 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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Complex viscosity (η*) vs. angular frequency (ω) for various modified PETs by (a) EPOX, (b) ADR-4468, (c) PGMSx and (d) different chain extender at in the same concentration.