000			01667nam a2200241Ia 4500
008			220216s9999 xx 000 0 und d
100			_aRatnayake Upul
245		0	_aSoluble-protein-free radiation-vulcanised natural rubber latex
260			_bJournal of Rubber Research _c2001
300			_a153-163
520			_aThe effect of water-soluble polymers (WSPs), such as polyvinyl alcohol (PVA) and polyvinyl pyrolidone (PVP), on radiation-vulcanised natural rubber latex (RVNRL) was investigated. Extractable protein measurements showed that mixing of WSP into RVNRL, followed by centrifugation, effectively reduced the extractable protein from RVNRL. However, extractable protein could be further effectively removed from RVNRL by adding low-molecular-weight PVA (LMW-PVA) and PVP followed by 20 min leaching in 1;ammonia solution, was sufficient to produce RVNRL free of soluble proteins. Based on these results a new process has been developed by the incorporation of LMW-WSP iinto RVNRL and centrifugation, followed by leaching. Tensile properties such as tensile and tear strength, were comparable to those of conventional RVNRL. Fourier Transform Infrared measurements showed that most of the WSP was removed from RVNRL during the centrifugation process. The viscosity of the RVNRL was not much affected by the addition of LMR-WSP.
650			_aCentrifugation
650			_aExtractable protein
650			_aFTIR
650			_aMolecular weight
650			_aNR latex
650			_aPolyvinyl pyrolidone
650			_aRadiation vulcanised NR latex
650			_aWater-soluble polymers
700			_aMakuuchi K
700			_aYoshii F
942			_cJS
999			_c68892 _d68892