000			01326nam a2200265Ia 4500
008			220216s9999 xx 000 0 und d
100			_aVarkey J K
245		0	_aAgeing of natural rubber vulcanizates in acid and alkali solutions
260			_bIndian Journal of Natural Rubber Research _c1992
300			_a133-140
520			_aResistance of natural rubber vulcanizates towards hot aqueous solutions of a few industrially important chemicals was studied. Absorption of water by rubbers containing lyophilic materials is a diffusion/osmotic phenomenon. Retention of strength after ageing in distilled water is lower, compared to that after ageing in aqueous media containing acid or alkali, provided the media are inert towards rubber. As the concentration of acid or alkali in the ageing media increases, the tendency for water to diffuse into the rubber matrix gets reduced. Reinforcing and nonhydrophilic fillers were found to reduce water absorption.
650			_aAgeing
650			_aAgeing
650			_aChemical resistance
650			_aChemical resistance
650			_aNatural rubber
650			_aNatural rubber
650			_aVulcanizates
650			_aVulcanizates
650			_aWater absorption
650			_aWater absorption
700			_aMathew N M
700			_aPillai P V
942			_cAR
999			_c47075 _d47075