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Degradation of Styrenic Plastics during Recycling: Accommodation of PP within ABS after WEEE Plastics Imperfect Sorting

With the development of dark polymers for industrial sorting technologies, economically profitable recycling of plastics from Waste Electrical and Electronical Equipment (WEEE) can be envisaged even in the presence of residual impurities. In ABS extracted from WEEE, PP is expected to be the more det...

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Autores principales: Signoret, Charles, Girard, Pierre, Guen, Agathe Le, Caro-Bretelle, Anne-Sophie, Lopez-Cuesta, José-Marie, Ienny, Patrick, Perrin, Didier
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8124459/
https://www.ncbi.nlm.nih.gov/pubmed/33947020
http://dx.doi.org/10.3390/polym13091439
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author Signoret, Charles
Girard, Pierre
Guen, Agathe Le
Caro-Bretelle, Anne-Sophie
Lopez-Cuesta, José-Marie
Ienny, Patrick
Perrin, Didier
author_facet Signoret, Charles
Girard, Pierre
Guen, Agathe Le
Caro-Bretelle, Anne-Sophie
Lopez-Cuesta, José-Marie
Ienny, Patrick
Perrin, Didier
author_sort Signoret, Charles
collection PubMed
description With the development of dark polymers for industrial sorting technologies, economically profitable recycling of plastics from Waste Electrical and Electronical Equipment (WEEE) can be envisaged even in the presence of residual impurities. In ABS extracted from WEEE, PP is expected to be the more detrimental because of its important lack of compatibility. Hence, PP was incorporated to ABS at different rates (2 to 8 wt%) with a twin-screw extruder. PP was shown to exhibit a nodular morphology with an average diameter around 1–2 µm. Tensile properties were importantly diminished beyond 4 wt% but impact resistance was decreased even at 2 wt%. Both properties were strongly reduced as function of the contamination rate. Various potential compatibilizers for the ABS + 4 wt% PP system were evaluated: PPH-g-MA, PPC-g-MA, ABS-g-MA, TPE-g-MA, SEBS and PP-g-SAN. SEBS was found the most promising, leading to diminution of nodule sizes and also acting as an impact modifier. Finally, a Design Of Experiments using the Response Surface Methodology (DOE-RSM) was applied to visualize the impacts and interactions of extrusion temperature and screw speed on impact resistance of compatibilized and uncompatibilized ABS + 4 wt% PP systems. Resilience improvements were obtained for the uncompatibilized system and interactions between extrusion parameters and compatibilizers were noticed.
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spelling pubmed-81244592021-05-17 Degradation of Styrenic Plastics during Recycling: Accommodation of PP within ABS after WEEE Plastics Imperfect Sorting Signoret, Charles Girard, Pierre Guen, Agathe Le Caro-Bretelle, Anne-Sophie Lopez-Cuesta, José-Marie Ienny, Patrick Perrin, Didier Polymers (Basel) Article With the development of dark polymers for industrial sorting technologies, economically profitable recycling of plastics from Waste Electrical and Electronical Equipment (WEEE) can be envisaged even in the presence of residual impurities. In ABS extracted from WEEE, PP is expected to be the more detrimental because of its important lack of compatibility. Hence, PP was incorporated to ABS at different rates (2 to 8 wt%) with a twin-screw extruder. PP was shown to exhibit a nodular morphology with an average diameter around 1–2 µm. Tensile properties were importantly diminished beyond 4 wt% but impact resistance was decreased even at 2 wt%. Both properties were strongly reduced as function of the contamination rate. Various potential compatibilizers for the ABS + 4 wt% PP system were evaluated: PPH-g-MA, PPC-g-MA, ABS-g-MA, TPE-g-MA, SEBS and PP-g-SAN. SEBS was found the most promising, leading to diminution of nodule sizes and also acting as an impact modifier. Finally, a Design Of Experiments using the Response Surface Methodology (DOE-RSM) was applied to visualize the impacts and interactions of extrusion temperature and screw speed on impact resistance of compatibilized and uncompatibilized ABS + 4 wt% PP systems. Resilience improvements were obtained for the uncompatibilized system and interactions between extrusion parameters and compatibilizers were noticed. MDPI 2021-04-29 /pmc/articles/PMC8124459/ /pubmed/33947020 http://dx.doi.org/10.3390/polym13091439 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
Signoret, Charles
Girard, Pierre
Guen, Agathe Le
Caro-Bretelle, Anne-Sophie
Lopez-Cuesta, José-Marie
Ienny, Patrick
Perrin, Didier
Degradation of Styrenic Plastics during Recycling: Accommodation of PP within ABS after WEEE Plastics Imperfect Sorting
title Degradation of Styrenic Plastics during Recycling: Accommodation of PP within ABS after WEEE Plastics Imperfect Sorting
title_full Degradation of Styrenic Plastics during Recycling: Accommodation of PP within ABS after WEEE Plastics Imperfect Sorting
title_fullStr Degradation of Styrenic Plastics during Recycling: Accommodation of PP within ABS after WEEE Plastics Imperfect Sorting
title_full_unstemmed Degradation of Styrenic Plastics during Recycling: Accommodation of PP within ABS after WEEE Plastics Imperfect Sorting
title_short Degradation of Styrenic Plastics during Recycling: Accommodation of PP within ABS after WEEE Plastics Imperfect Sorting
title_sort degradation of styrenic plastics during recycling: accommodation of pp within abs after weee plastics imperfect sorting
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8124459/
https://www.ncbi.nlm.nih.gov/pubmed/33947020
http://dx.doi.org/10.3390/polym13091439
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