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Radiation Graft-Copolymerization of Ultrafine Fully Vulcanized Powdered Natural Rubber: Effects of Styrene and Acrylonitrile Contents on Thermal Stability

Graft copolymers, deproteinized natural rubber-graft-polystyrene (DPNR-g-PS) and deproteinized natural rubber-graft-polyacrylonitrile (DPNR-g-PAN), were prepared by the grafting of styrene (St) or acrylonitrile (AN) monomers onto DPNR latex via emulsion copolymerization. Then, ultrafine fully vulcan...

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Autores principales: Rimdusit, Niratchaporn, Jubsilp, Chanchira, Mora, Phattarin, Hemvichian, Kasinee, Thuy, Tran Thi, Karagiannidis, Panagiotis, Rimdusit, Sarawut
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8512830/
https://www.ncbi.nlm.nih.gov/pubmed/34641262
http://dx.doi.org/10.3390/polym13193447
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author Rimdusit, Niratchaporn
Jubsilp, Chanchira
Mora, Phattarin
Hemvichian, Kasinee
Thuy, Tran Thi
Karagiannidis, Panagiotis
Rimdusit, Sarawut
author_facet Rimdusit, Niratchaporn
Jubsilp, Chanchira
Mora, Phattarin
Hemvichian, Kasinee
Thuy, Tran Thi
Karagiannidis, Panagiotis
Rimdusit, Sarawut
author_sort Rimdusit, Niratchaporn
collection PubMed
description Graft copolymers, deproteinized natural rubber-graft-polystyrene (DPNR-g-PS) and deproteinized natural rubber-graft-polyacrylonitrile (DPNR-g-PAN), were prepared by the grafting of styrene (St) or acrylonitrile (AN) monomers onto DPNR latex via emulsion copolymerization. Then, ultrafine fully vulcanized powdered natural rubbers (UFPNRs) were produced by electron beam irradiation of the graft copolymers in the presence of di-trimethylolpropane tetra-acrylate (DTMPTA) as a crosslinking agent and, subsequently, a fast spray drying process. The effects of St or AN monomer contents and the radiation doses on the chemical structure, thermal stability, and physical properties of the graft copolymers and UFPNRs were investigated. The results showed that solvent resistance and grafting efficiency of DPNR-g-PS and DPNR-g-PAN were enhanced with increasing monomer content. SEM morphology of the UFPNRs showed separated and much less agglomerated particles with an average size about 6 μm. Therefore, it is possible that the developed UFPNRs grafted copolymers with good solvent resistance and rather high thermal stability can be used easily as toughening modifiers for polymers and their composites.
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spelling pubmed-85128302021-10-14 Radiation Graft-Copolymerization of Ultrafine Fully Vulcanized Powdered Natural Rubber: Effects of Styrene and Acrylonitrile Contents on Thermal Stability Rimdusit, Niratchaporn Jubsilp, Chanchira Mora, Phattarin Hemvichian, Kasinee Thuy, Tran Thi Karagiannidis, Panagiotis Rimdusit, Sarawut Polymers (Basel) Article Graft copolymers, deproteinized natural rubber-graft-polystyrene (DPNR-g-PS) and deproteinized natural rubber-graft-polyacrylonitrile (DPNR-g-PAN), were prepared by the grafting of styrene (St) or acrylonitrile (AN) monomers onto DPNR latex via emulsion copolymerization. Then, ultrafine fully vulcanized powdered natural rubbers (UFPNRs) were produced by electron beam irradiation of the graft copolymers in the presence of di-trimethylolpropane tetra-acrylate (DTMPTA) as a crosslinking agent and, subsequently, a fast spray drying process. The effects of St or AN monomer contents and the radiation doses on the chemical structure, thermal stability, and physical properties of the graft copolymers and UFPNRs were investigated. The results showed that solvent resistance and grafting efficiency of DPNR-g-PS and DPNR-g-PAN were enhanced with increasing monomer content. SEM morphology of the UFPNRs showed separated and much less agglomerated particles with an average size about 6 μm. Therefore, it is possible that the developed UFPNRs grafted copolymers with good solvent resistance and rather high thermal stability can be used easily as toughening modifiers for polymers and their composites. MDPI 2021-10-08 /pmc/articles/PMC8512830/ /pubmed/34641262 http://dx.doi.org/10.3390/polym13193447 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
Rimdusit, Niratchaporn
Jubsilp, Chanchira
Mora, Phattarin
Hemvichian, Kasinee
Thuy, Tran Thi
Karagiannidis, Panagiotis
Rimdusit, Sarawut
Radiation Graft-Copolymerization of Ultrafine Fully Vulcanized Powdered Natural Rubber: Effects of Styrene and Acrylonitrile Contents on Thermal Stability
title Radiation Graft-Copolymerization of Ultrafine Fully Vulcanized Powdered Natural Rubber: Effects of Styrene and Acrylonitrile Contents on Thermal Stability
title_full Radiation Graft-Copolymerization of Ultrafine Fully Vulcanized Powdered Natural Rubber: Effects of Styrene and Acrylonitrile Contents on Thermal Stability
title_fullStr Radiation Graft-Copolymerization of Ultrafine Fully Vulcanized Powdered Natural Rubber: Effects of Styrene and Acrylonitrile Contents on Thermal Stability
title_full_unstemmed Radiation Graft-Copolymerization of Ultrafine Fully Vulcanized Powdered Natural Rubber: Effects of Styrene and Acrylonitrile Contents on Thermal Stability
title_short Radiation Graft-Copolymerization of Ultrafine Fully Vulcanized Powdered Natural Rubber: Effects of Styrene and Acrylonitrile Contents on Thermal Stability
title_sort radiation graft-copolymerization of ultrafine fully vulcanized powdered natural rubber: effects of styrene and acrylonitrile contents on thermal stability
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8512830/
https://www.ncbi.nlm.nih.gov/pubmed/34641262
http://dx.doi.org/10.3390/polym13193447
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