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The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE
Peroxide has been considered a chemical agent that can be used to tune the properties of polymeric materials. This research evaluated the influence of different concentrations of dialkyl peroxides on the mechanical, thermal, and morphological properties of linear low-density polyethylene (LLDPE) and...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8470150/ https://www.ncbi.nlm.nih.gov/pubmed/34577963 http://dx.doi.org/10.3390/polym13183062 |
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author | Cardoso, Pollyana S. M. Ueki, Marcelo M. Barbosa, Josiane D. V. Garcia Filho, Fabio C. Lazarus, Benjamin S. Azevedo, Joyce B. |
author_facet | Cardoso, Pollyana S. M. Ueki, Marcelo M. Barbosa, Josiane D. V. Garcia Filho, Fabio C. Lazarus, Benjamin S. Azevedo, Joyce B. |
author_sort | Cardoso, Pollyana S. M. |
collection | PubMed |
description | Peroxide has been considered a chemical agent that can be used to tune the properties of polymeric materials. This research evaluated the influence of different concentrations of dialkyl peroxides on the mechanical, thermal, and morphological properties of linear low-density polyethylene (LLDPE) and ultra-high molecular weight polyethylene (UHMWPE). The neat polymer, as well as those with the addition of 1% and 2% by mass of dialkyl peroxides, were subjected to compression molding and immersion in water for 1 h, under controlled temperatures of 90 °C. The values of the gel content found in the samples indicated that the addition of peroxide to the LLDPE and to the UHMWPE promoted the formation of a reticulated network. The structure obtained by the crosslinking led to less reorganization of the chains during the crystallization process, resulting in the formation of imperfect crystals and, consequently, in the reduction in melting temperatures, crystallization and enthalpy. The mechanical properties were altered with the presence of the crosslinker. The polymers presented had predominant characteristics of a ductile material, with the occurrence of crazing with an increased peroxide content. |
format | Online Article Text |
id | pubmed-8470150 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-84701502021-09-27 The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE Cardoso, Pollyana S. M. Ueki, Marcelo M. Barbosa, Josiane D. V. Garcia Filho, Fabio C. Lazarus, Benjamin S. Azevedo, Joyce B. Polymers (Basel) Article Peroxide has been considered a chemical agent that can be used to tune the properties of polymeric materials. This research evaluated the influence of different concentrations of dialkyl peroxides on the mechanical, thermal, and morphological properties of linear low-density polyethylene (LLDPE) and ultra-high molecular weight polyethylene (UHMWPE). The neat polymer, as well as those with the addition of 1% and 2% by mass of dialkyl peroxides, were subjected to compression molding and immersion in water for 1 h, under controlled temperatures of 90 °C. The values of the gel content found in the samples indicated that the addition of peroxide to the LLDPE and to the UHMWPE promoted the formation of a reticulated network. The structure obtained by the crosslinking led to less reorganization of the chains during the crystallization process, resulting in the formation of imperfect crystals and, consequently, in the reduction in melting temperatures, crystallization and enthalpy. The mechanical properties were altered with the presence of the crosslinker. The polymers presented had predominant characteristics of a ductile material, with the occurrence of crazing with an increased peroxide content. MDPI 2021-09-10 /pmc/articles/PMC8470150/ /pubmed/34577963 http://dx.doi.org/10.3390/polym13183062 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 Cardoso, Pollyana S. M. Ueki, Marcelo M. Barbosa, Josiane D. V. Garcia Filho, Fabio C. Lazarus, Benjamin S. Azevedo, Joyce B. The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE |
title | The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE |
title_full | The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE |
title_fullStr | The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE |
title_full_unstemmed | The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE |
title_short | The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE |
title_sort | effect of dialkyl peroxide crosslinking on the properties of lldpe and uhmwpe |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8470150/ https://www.ncbi.nlm.nih.gov/pubmed/34577963 http://dx.doi.org/10.3390/polym13183062 |
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