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. 2021 Jun 28;22(13):6950. doi: 10.3390/ijms22136950

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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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Relationship between the average molecular weight of the polylactide and monomer conversion; polymerization was conducted in bulk at 120 °C, initiated by Zn[(LPhe)(acac)H₂O] (a), and Zn[(acac)(LTrp)H₂O] (b). Series 1—with an M/I ratio of 150:1; Series 2—with an M/I ratio of 400:1; and Series 3—with an M/I ratio of 600:1.