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Mechano Chemical Compatibilization of Polyethylene with Graphite by Means of a Suitable Ester

An effective non-covalent compatibilization method for graphite and low-density polyethylene is reported. To obtain this result, pyren-1-yl-stearate (P1S) was synthesized, characterized and mixed with graphite to provide a better dispersion in polyethylene matrix. The P1S improves the dispersion of...

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Autores principales: Russo, Simona, Acocella, Maria Rosaria, Mariconda, Annaluisa, Volpe, Valentina, Pantani, Roberto, Longo, Pasquale
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10346664/
https://www.ncbi.nlm.nih.gov/pubmed/37447416
http://dx.doi.org/10.3390/polym15132770
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author Russo, Simona
Acocella, Maria Rosaria
Mariconda, Annaluisa
Volpe, Valentina
Pantani, Roberto
Longo, Pasquale
author_facet Russo, Simona
Acocella, Maria Rosaria
Mariconda, Annaluisa
Volpe, Valentina
Pantani, Roberto
Longo, Pasquale
author_sort Russo, Simona
collection PubMed
description An effective non-covalent compatibilization method for graphite and low-density polyethylene is reported. To obtain this result, pyren-1-yl-stearate (P1S) was synthesized, characterized and mixed with graphite to provide a better dispersion in polyethylene matrix. The P1S improves the dispersion of carbon filler in polyethylene through non-covalent compatibilization: the pyrenyl group gives π−π stacking interactions with graphite and the stearyl chain provides van der Waals interaction with the polymer chain (specifically London dispersion forces). In this study, different P1S/graphite fillers were prepared with a ratio by weight of 90/10 and 50/50, respectively, by using manual and ball-milling mixing. Their stability, interaction and morphology were evaluated through TGA, RX, and SEM. Thermogravimetric analyses showed that ball-milling mixing is more effective than manual mixing in promoting π−π stacking interactions of molecules such as P1S ester containing an alkyl chain and aromatic rings. The role of ball milling is confirmed by X-ray diffraction measurements since it was possible to observe both exfoliation and intercalation phenomena when this technique was used to mix the P1S ester with graphite. SEM analyses of polyethylene containing 1% of the carbon fillers again highlighted the importance of ball milling to promote the interaction of the ester with graphite and, simultaneously, the importance of the alkyl chain in order to achieve polyethylene-graphite compatibilization.
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spelling pubmed-103466642023-07-15 Mechano Chemical Compatibilization of Polyethylene with Graphite by Means of a Suitable Ester Russo, Simona Acocella, Maria Rosaria Mariconda, Annaluisa Volpe, Valentina Pantani, Roberto Longo, Pasquale Polymers (Basel) Article An effective non-covalent compatibilization method for graphite and low-density polyethylene is reported. To obtain this result, pyren-1-yl-stearate (P1S) was synthesized, characterized and mixed with graphite to provide a better dispersion in polyethylene matrix. The P1S improves the dispersion of carbon filler in polyethylene through non-covalent compatibilization: the pyrenyl group gives π−π stacking interactions with graphite and the stearyl chain provides van der Waals interaction with the polymer chain (specifically London dispersion forces). In this study, different P1S/graphite fillers were prepared with a ratio by weight of 90/10 and 50/50, respectively, by using manual and ball-milling mixing. Their stability, interaction and morphology were evaluated through TGA, RX, and SEM. Thermogravimetric analyses showed that ball-milling mixing is more effective than manual mixing in promoting π−π stacking interactions of molecules such as P1S ester containing an alkyl chain and aromatic rings. The role of ball milling is confirmed by X-ray diffraction measurements since it was possible to observe both exfoliation and intercalation phenomena when this technique was used to mix the P1S ester with graphite. SEM analyses of polyethylene containing 1% of the carbon fillers again highlighted the importance of ball milling to promote the interaction of the ester with graphite and, simultaneously, the importance of the alkyl chain in order to achieve polyethylene-graphite compatibilization. MDPI 2023-06-21 /pmc/articles/PMC10346664/ /pubmed/37447416 http://dx.doi.org/10.3390/polym15132770 Text en © 2023 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
Russo, Simona
Acocella, Maria Rosaria
Mariconda, Annaluisa
Volpe, Valentina
Pantani, Roberto
Longo, Pasquale
Mechano Chemical Compatibilization of Polyethylene with Graphite by Means of a Suitable Ester
title Mechano Chemical Compatibilization of Polyethylene with Graphite by Means of a Suitable Ester
title_full Mechano Chemical Compatibilization of Polyethylene with Graphite by Means of a Suitable Ester
title_fullStr Mechano Chemical Compatibilization of Polyethylene with Graphite by Means of a Suitable Ester
title_full_unstemmed Mechano Chemical Compatibilization of Polyethylene with Graphite by Means of a Suitable Ester
title_short Mechano Chemical Compatibilization of Polyethylene with Graphite by Means of a Suitable Ester
title_sort mechano chemical compatibilization of polyethylene with graphite by means of a suitable ester
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10346664/
https://www.ncbi.nlm.nih.gov/pubmed/37447416
http://dx.doi.org/10.3390/polym15132770
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