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 and Rimdusit, Sarawut (2021) Radiation graft-copolymerization of ultrafine fully vulcanized powdered natural rubber: Effects of styrene and acrylonitrile contents on thermal stability. Polymers. ISSN 2073-4360 (In Press)

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Abstract

Graft copolymers, deproteinized natural rubber-graft-polystyrene (DPNR-g-PS) and deproteinized natural rubber-graft-polyacrylonitrile (DPNR-g-PAN), were prepared by 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 tetraacrylate (DTMPTA) as 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.

Item Type: Article
Subjects: Sciences > Chemistry
Engineering > Mechanical Engineering
Divisions: Faculty of Technology > School of Engineering
Depositing User: Panagiotis Karagiannidis
Date Deposited: 06 Oct 2021 10:16
Last Modified: 06 Oct 2021 10:16
URI: http://sure.sunderland.ac.uk/id/eprint/14099
ORCID for Panagiotis Karagiannidis: ORCID iD orcid.org/0000-0002-2709-4161

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