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Stiff-Elongated Balance of PLA-Based Polymer Blends

In this study, polymer blends with a mechanical property balance based on poly(lactic acid) (PLA), stiff polymer, and elongated polymer were developed. First, the binary blends PLA-elongated polymer [ethyl vinyl acetate (EVA) or polyethylene], or PLA-stiff polymer [polystyrene or poly(styrene-co-met...

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Autores principales: Mendoza-Duarte, Mónica Elvira, Estrada-Moreno, Iván Alziri, García-Casillas, Perla Elvia, Vega-Rios, Alejandro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8703449/
https://www.ncbi.nlm.nih.gov/pubmed/34960830
http://dx.doi.org/10.3390/polym13244279
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author Mendoza-Duarte, Mónica Elvira
Estrada-Moreno, Iván Alziri
García-Casillas, Perla Elvia
Vega-Rios, Alejandro
author_facet Mendoza-Duarte, Mónica Elvira
Estrada-Moreno, Iván Alziri
García-Casillas, Perla Elvia
Vega-Rios, Alejandro
author_sort Mendoza-Duarte, Mónica Elvira
collection PubMed
description In this study, polymer blends with a mechanical property balance based on poly(lactic acid) (PLA), stiff polymer, and elongated polymer were developed. First, the binary blends PLA-elongated polymer [ethyl vinyl acetate (EVA) or polyethylene], or PLA-stiff polymer [polystyrene or poly(styrene-co-methyl methacrylate) (SMMA)] blends were studied using dynamic mechanic analysis (DMA) and analyzed using Minitab statistical software to determine the factors influencing the elongation or stiffness of the blends. Then, ternary blends such as elongation-poly(lactic acid)-stiff, were made from the binary blends that presented optimal performance. In addition, three blends [EVA–PLA–SMMA (EPS)] were elaborated by studying the mixing time (5, 15, and 15 min) and the added time of the SMMA (0, 0, and 10 min). Specifically, the mixing time for EPS 1, EPS 2, and EPS 3 is 5 min, 15 min, and 15 min (first EVA + PLA for 10 min, plus 5 min PLA-EVA and SMMA), respectively. Mechanical, thermal, rheological, and morphological properties of the blends were studied. According to DMA, the results show an increase in elongation at break (ε(b)) and do not decrease the elastic module of poly(lactic acid). Nevertheless, EPS 3 excels in all properties, with an ε(b) of 67% and modulus of elasticity similar to PLA. SMMA has a significant role as a compatibilizing agent and improves PLA processability.
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spelling pubmed-87034492021-12-25 Stiff-Elongated Balance of PLA-Based Polymer Blends Mendoza-Duarte, Mónica Elvira Estrada-Moreno, Iván Alziri García-Casillas, Perla Elvia Vega-Rios, Alejandro Polymers (Basel) Article In this study, polymer blends with a mechanical property balance based on poly(lactic acid) (PLA), stiff polymer, and elongated polymer were developed. First, the binary blends PLA-elongated polymer [ethyl vinyl acetate (EVA) or polyethylene], or PLA-stiff polymer [polystyrene or poly(styrene-co-methyl methacrylate) (SMMA)] blends were studied using dynamic mechanic analysis (DMA) and analyzed using Minitab statistical software to determine the factors influencing the elongation or stiffness of the blends. Then, ternary blends such as elongation-poly(lactic acid)-stiff, were made from the binary blends that presented optimal performance. In addition, three blends [EVA–PLA–SMMA (EPS)] were elaborated by studying the mixing time (5, 15, and 15 min) and the added time of the SMMA (0, 0, and 10 min). Specifically, the mixing time for EPS 1, EPS 2, and EPS 3 is 5 min, 15 min, and 15 min (first EVA + PLA for 10 min, plus 5 min PLA-EVA and SMMA), respectively. Mechanical, thermal, rheological, and morphological properties of the blends were studied. According to DMA, the results show an increase in elongation at break (ε(b)) and do not decrease the elastic module of poly(lactic acid). Nevertheless, EPS 3 excels in all properties, with an ε(b) of 67% and modulus of elasticity similar to PLA. SMMA has a significant role as a compatibilizing agent and improves PLA processability. MDPI 2021-12-07 /pmc/articles/PMC8703449/ /pubmed/34960830 http://dx.doi.org/10.3390/polym13244279 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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/).
spellingShingle Article
Mendoza-Duarte, Mónica Elvira
Estrada-Moreno, Iván Alziri
García-Casillas, Perla Elvia
Vega-Rios, Alejandro
Stiff-Elongated Balance of PLA-Based Polymer Blends
title Stiff-Elongated Balance of PLA-Based Polymer Blends
title_full Stiff-Elongated Balance of PLA-Based Polymer Blends
title_fullStr Stiff-Elongated Balance of PLA-Based Polymer Blends
title_full_unstemmed Stiff-Elongated Balance of PLA-Based Polymer Blends
title_short Stiff-Elongated Balance of PLA-Based Polymer Blends
title_sort stiff-elongated balance of pla-based polymer blends
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8703449/
https://www.ncbi.nlm.nih.gov/pubmed/34960830
http://dx.doi.org/10.3390/polym13244279
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