000			01809nam a2200217Ia 4500
008			220216s9999 xx 000 0 und d
100			_aJoseph Joy
245		0	_aPrediction of service life of rubber products based on arrhenius theory
260			_bRubber Science _c2019
300			_a83-93
520			_aDifferent types of rubbers have different ageing properties. Service life of rubber products is determined by the differences in ageing properties of the rubbers used in the products and the conditions to which the products are exposed to during their service life. The present work is an attempt to predict the service life of products made up of nitrile rubber (NBR), ethylene propylene diene (EPDM) rubber and NR based on the Arrhenius theory. Logarithm of days in air to reduce the tensile strength to least serviceable level of 10 MPa for NBR and EPDM and 20 MPa for NR were plotted against 1/T where T is the temperature in Kelvin scale. When the results were extrapolated to 1/T for room temperature (3.3x10 -3), we got log days for room temperature as 7.5 for NBR. This indicates that the product made out of the formulation used can give a service life of 1808 days in air. In a similar way it was predicted that the service life of the NBR product of the formulation studied was only 992 days in sea water. Similarly the service life of EPDM and NR of the formulation used in the present study was estimated as 2208 days and 633 days, respectively in air, and that in sea water was estimated to be 854 days and 81 days, respectively.
650			_aAgeing
650			_aEthylene propylene diene rubber
650			_aNatural rubber
650			_aNitrile rubber
650			_aService life
650			_aTensile strength
700			_aJacob M.K
700			_aVarkey K.J
942			_cJS
999			_c65472 _d65472