Publication: Ultrafine fully vulcanized natural rubber modified by graft-copolymerization with styrene and acrylonitrile monomers
0
0
Issued Date
2022
Resource Type
Language
eng
File Type
application/pdf
ISSN
21974365
Rights Holder(s)
มหาวิทยาลัยศรีนครินทรวิโรฒ
Bibliographic Citation
Res Militaris. Vol 12, No.2 (2022), p.7889-8004
Suggested Citation
Longsiri K., Mora P., Peeksuntiye W., Jubsilp C., Hemvichian K., Karagiannidis P., Rimdusit S. Ultrafine fully vulcanized natural rubber modified by graft-copolymerization with styrene and acrylonitrile monomers. Res Militaris. Vol 12, No.2 (2022), p.7889-8004. doi:10.1186/s40643-022-00577-5 Retrieved from: https://hdl.handle.net/20.500.14740/10074
Abstract
This research aims to modify ultrafine fully vulcanized powdered natural rubber (UFPNR) prepared by emulsion graft-copolymerization with styrene (St) and acrylonitrile (AN) monomers onto deproteinized natural rubber (DPNR). The effects of monomers content and St/AN weight ratio on grafting efficiency and thermal stability of the developed DPNR-g-(PS-co-PAN) were investigated. The results showed that grafting efficiency was enhanced up to 86% with monomers content 15 phr and weight ratio St:AN 80:20. The obtained DPNR-g-(PS-co-PAN) was radiated by an electron beam at various doses, followed by a spray drying process to produce UFPNR. The obtained modified UFPNR particles irradiated at dose up to 300 kGy were relatively spherical with a particle size of approximately 4.4 µm. Furthermore, the degradation temperature of 5wt% loss (Td5) of UFPNR was found in the range of 349–356 °C. The results revealed that the modified UFPNR is suitable as a toughening filler for a broader spectrum of polymers. Graphical Abstract: [Figure not available: see fulltext.]. © 2022, The Author(s).