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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...

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Autores principales: Manaila, Elena, Craciun, Gabriela, Ighigeanu, Daniel, Lungu, Ion Bogdan, Dumitru, Marius, Stelescu, Maria Daniela
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
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.
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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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