000			01484nam a2200217Ia 4500
008			220216s9999 xx 000 0 und d
100			_aVarghese L
245		0	_aUse of sulphuric acid as coagulant for natural rubber latex: Long term effects on rubber and machinery
260			_bIndian Journal of Natural Rubber Research _c1996
300			_a22-27
520			_aDetailed investigations were carried out on the ageing behaviour of air dried sheet rubber prepared using sulphuric acid as coagulant, in comparison with that of sheets prepared using formic acid. Long term thermo-oxidative ageing of vulcanizates prepared from the sheets was also studied. Observations have also been made on the extent of corrosion on coagulation pans and sheeting rollers for a period of two years. It was found that decrease in the strength of raw rubber sheets prepared with sulphuric acid was negligible over a period of one year. Ageing behaviour of vulcanizates from sheets prepared using sulphuric acid was comparable to those prepared using formic acid, if the recommended conditions of use are followed. Corrosion of aluminium pans and sheeting rollers was negligible, when sulphuric acid was used as coagulant and recommended practices were followed.
650			_aAgeing
650			_aFormic acid
650			_aLatex coagulation
650			_aNatural rubber
650			_aSulphuric acid
650			_aVulcanizates
700			_aGeorge K M
700			_aMathew N M
942			_cJS
999			_c71966 _d71966