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.
BIORESOUR BIOPROCESS 2022;
9:85. [PMID:
38647744 PMCID:
PMC10992880 DOI:
10.1186/s40643-022-00577-5]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 08/10/2022] [Indexed: 11/10/2022] Open
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.
Collapse