000			01529nam a2200217Ia 4500
008			220216s9999 xx 000 0 und d
100			_aNakason C
245		0	_aPreliminary study on the preparation of latex foam rubber from graft copolymer of deproteinised natural rubber and methyl methacrylate
260			_bJournal of Rubber Research _c2001
300			_a141-152
520			_aDeproteinised natural rubber (DPNR) latex was prepareed by incubation of fresh field natural rubber latex with a proteolytic enzyme in the presence of an emulsifier. The nitrogen content was decreased from 0.9;(in the fresh field natural rubber letex) to 0.07;(in the DPNR). A graft copolymer of the deproteinised natural rubber latex and poly(methyl methacrylate) as a redox initiator. The presence of grafted PMMA in the natural rubber molecules was confirmed using FTIR. Intense absorption peaks at 1732 cm-1 (-C=0 stretch) and 1140 cm-1 (-C-0 stretch) were observed. It was also found that hardness, compression set and density of the latex foam rubber increased with the increase in the level of graft copolymer in compounding formulation. Furthermmore, at the same blend ratio, the properties increased with the increase in the level of methyl methacrylate used in the grafting reaction.
650			_aDeproteinised natural rubber
650			_aFTIR
650			_aGraft copolymer
650			_aLatex foam rubber
650			_aMethylacrylate
700			_aKaesaman A
700			_aKetsarin K
700			_aYimwan N
942			_cJS
999			_c65533 _d65533