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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doaj-1e06342d4067474ba31f6115adf2f4082021-06-30T23:57:56ZengMDPI AGPolymers2073-43602021-06-01131950195010.3390/polym13121950Electron Beam Irradiation: A Method for Degradation of Composites Based on Natural Rubber and Plasticized StarchElena Manaila0Gabriela Craciun1Daniel Ighigeanu2Ion Bogdan Lungu3Marius Dumitru4Maria Daniela Stelescu5Electron Accelerators Laboratory, National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor St., 077125 Măgurele, RomaniaElectron Accelerators Laboratory, National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor St., 077125 Măgurele, RomaniaElectron Accelerators Laboratory, National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor St., 077125 Măgurele, RomaniaHoria Hulubei National Institute for R&D in Physics and Nuclear Engineering, Multipurpose Irradiation Facility Center—IRASM, 30 Reactorului St., 077125 Măgurele, RomaniaElectron Accelerators Laboratory, National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor St., 077125 Măgurele, RomaniaNational R&D Institute for Textile and Leather—Leather and Footwear Research Institute, 93 Ion Minulescu St., 031215 Bucharest, RomaniaPolymeric 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.https://www.mdpi.com/2073-4360/13/12/1950natural rubberfillerplasticized starchelectron beamdegradation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Elena Manaila Gabriela Craciun Daniel Ighigeanu Ion Bogdan Lungu Marius Dumitru Maria Daniela Stelescu |
spellingShingle |
Elena Manaila Gabriela Craciun Daniel Ighigeanu Ion Bogdan Lungu Marius Dumitru Maria Daniela Stelescu Electron Beam Irradiation: A Method for Degradation of Composites Based on Natural Rubber and Plasticized Starch Polymers natural rubber filler plasticized starch electron beam degradation |
author_facet |
Elena Manaila Gabriela Craciun Daniel Ighigeanu Ion Bogdan Lungu Marius Dumitru Maria Daniela Stelescu |
author_sort |
Elena Manaila |
title |
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_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_sort |
electron beam irradiation: a method for degradation of composites based on natural rubber and plasticized starch |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2021-06-01 |
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. |
topic |
natural rubber filler plasticized starch electron beam degradation |
url |
https://www.mdpi.com/2073-4360/13/12/1950 |
work_keys_str_mv |
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