Prediction of cure time for a rubber cement used for conveyer belt splicing

摘要

AbstractThe evolution of bonding strength for a commercial cold vulcanizing rubber cement was determined using small–mscale simulated conveyer belt splicing. Peel and shear data obtained under isothermal conditions fit a modified Avrami modelX= 1 − exp(−kt1/2), whereXis the degree of ultimate shear or peel bond strength obtained and the rate constantkshows a typical Arrhenius type temperature dependencek= 42 exp(1670/T) min1/2for peel strength, andk= 57 exp(−2000/T) min1/2for shear strength. (Tis the absolute temperature in K.) Bonding strength evolution under nonisothermal cure conditions can be estimated by integrating the general rate expressiondX/dt= 0.5k2(1 −X)/(