Publication: Radiation graft-copolymerization of ultrafine fully vulcanized powdered natural rubber: Effects of styrene and acrylonitrile contents on thermal stability
0
0
Issued Date
2021
Resource Type
Language
eng
File Type
application/pdf
ISSN
20734360
Other identifier(s)
2-s2.0-85116628666
Rights Holder(s)
Scopus
Bibliographic Citation
Polymers. Vol 13, No.19 (2021)
Suggested Citation
Rimdusit N., Jubsilp C., Mora P., Hemvichian K., Thuy T.T., Karagiannidis P., Rimdusit S. Radiation graft-copolymerization of ultrafine fully vulcanized powdered natural rubber: Effects of styrene and acrylonitrile contents on thermal stability. Polymers. Vol 13, No.19 (2021). doi:10.3390/polym13193447 Retrieved from: https://hdl.handle.net/20.500.14740/8174
Abstract
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. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Subject(s)
Chemical stability
Crosslinking
Electron beams
Emulsification
Grafting (chemical)
Radiation effects
Rubber
Styrene
Thermodynamic stability
Electron beam vulcanization
Electron-beam
Graft- copolymers
Natural rubber-graft-polyacrylonitrile
Natural rubber-graft-polystyrene
Powdered rubber
Spray-drying
Ultra-fines
Ultrafine
Ultrafine fully vulcanized powdered rubber
Vulcanisation
Polystyrenes
Crosslinking
Electron beams
Emulsification
Grafting (chemical)
Radiation effects
Rubber
Styrene
Thermodynamic stability
Electron beam vulcanization
Electron-beam
Graft- copolymers
Natural rubber-graft-polyacrylonitrile
Natural rubber-graft-polystyrene
Powdered rubber
Spray-drying
Ultra-fines
Ultrafine
Ultrafine fully vulcanized powdered rubber
Vulcanisation
Polystyrenes