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Electron Beam Irradiation: A Method for Degradation of Composites Based on Natural Rubber and Plasticized Starch
Polymeric composites based on natural rubber (NR) and plasticized starch (PS) obtained by peroxide cross-linking have been subjected to electron beam irradiation in order to investigate their degradation. The amount of PS ranged from 10 to 50 phr and the irradiation dose from 150 to 450 kGy. Irradia...
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/PMC8230875/ https://www.ncbi.nlm.nih.gov/pubmed/34208234 http://dx.doi.org/10.3390/polym13121950 |
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author | Manaila, Elena Craciun, Gabriela Ighigeanu, Daniel Lungu, Ion Bogdan Dumitru, Marius Stelescu, Maria Daniela |
author_facet | Manaila, Elena Craciun, Gabriela Ighigeanu, Daniel Lungu, Ion Bogdan Dumitru, Marius Stelescu, Maria Daniela |
author_sort | Manaila, Elena |
collection | PubMed |
description | Polymeric composites based on natural rubber (NR) and plasticized starch (PS) obtained by peroxide cross-linking have been subjected to electron beam irradiation in order to investigate their degradation. The amount of PS ranged from 10 to 50 phr and the irradiation dose from 150 to 450 kGy. Irradiation was performed in atmospheric conditions using a linear electron accelerator of 5.5 MeV. Changes in chemical, physical, structural, and morphological properties of composites were correlated with variables, such as PS loading and irradiation dose. Thus, mechanical properties, gel fraction, cross-linking degree, water uptake, weight loss in toluene/water were compared with those obtained before irradiation. The changes in structure and morphology were studied by Fourier Transform Infrared Spectroscopy and Scanning Electron Microscopy. Both PS loading and irradiation dose were found to be responsible for the degradation installing. Moreover, it has been shown that at the dose of 450 kGy, chain scission is dominant over cross-linking. |
format | Online Article Text |
id | pubmed-8230875 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-82308752021-06-26 Electron Beam Irradiation: A Method for Degradation of Composites Based on Natural Rubber and Plasticized Starch Manaila, Elena Craciun, Gabriela Ighigeanu, Daniel Lungu, Ion Bogdan Dumitru, Marius Stelescu, Maria Daniela Polymers (Basel) Article Polymeric composites based on natural rubber (NR) and plasticized starch (PS) obtained by peroxide cross-linking have been subjected to electron beam irradiation in order to investigate their degradation. The amount of PS ranged from 10 to 50 phr and the irradiation dose from 150 to 450 kGy. Irradiation was performed in atmospheric conditions using a linear electron accelerator of 5.5 MeV. Changes in chemical, physical, structural, and morphological properties of composites were correlated with variables, such as PS loading and irradiation dose. Thus, mechanical properties, gel fraction, cross-linking degree, water uptake, weight loss in toluene/water were compared with those obtained before irradiation. The changes in structure and morphology were studied by Fourier Transform Infrared Spectroscopy and Scanning Electron Microscopy. Both PS loading and irradiation dose were found to be responsible for the degradation installing. Moreover, it has been shown that at the dose of 450 kGy, chain scission is dominant over cross-linking. MDPI 2021-06-11 /pmc/articles/PMC8230875/ /pubmed/34208234 http://dx.doi.org/10.3390/polym13121950 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 Manaila, Elena Craciun, Gabriela Ighigeanu, Daniel Lungu, Ion Bogdan Dumitru, Marius Stelescu, Maria Daniela Electron Beam Irradiation: A Method for Degradation of Composites Based on Natural Rubber and Plasticized Starch |
title | Electron Beam Irradiation: A Method for Degradation of Composites Based on Natural Rubber and Plasticized Starch |
title_full | Electron Beam Irradiation: A Method for Degradation of Composites Based on Natural Rubber and Plasticized Starch |
title_fullStr | Electron Beam Irradiation: A Method for Degradation of Composites Based on Natural Rubber and Plasticized Starch |
title_full_unstemmed | Electron Beam Irradiation: A Method for Degradation of Composites Based on Natural Rubber and Plasticized Starch |
title_short | Electron Beam Irradiation: A Method for Degradation of Composites Based on Natural Rubber and Plasticized Starch |
title_sort | electron beam irradiation: a method for degradation of composites based on natural rubber and plasticized starch |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8230875/ https://www.ncbi.nlm.nih.gov/pubmed/34208234 http://dx.doi.org/10.3390/polym13121950 |
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