期刊
BIORESOURCES AND BIOPROCESSING
卷 9, 期 1, 页码 -出版社
SPRINGER HEIDELBERG
DOI: 10.1186/s40643-022-00577-5
关键词
Graft copolymer; DPNR-g-(PS-co-PAN); UFPNR; Electron beam vulcanization; Spray drying
资金
- NSRF [B05F640086]
- 90TH Anniversary of Chulalongkorn University Scholarship [50 3/2564]
- Chulalongkorn University
- Thailand Institute of Nuclear Technology (public organization), Thailand
This research aims to modify ultrafine fully vulcanized powdered natural rubber (UFPNR) by emulsion graft-copolymerization, and the results showed that the modified UFPNR particles are suitable as a toughening filler for a broader spectrum of polymers.
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 mu m. Furthermore, the degradation temperature of 5wt% loss (T-d5) of UFPNR was found in the range of 349-356 degrees C. The results revealed that the modified UFPNR is suitable as a toughening filler for a broader spectrum of polymers.
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