Abstract
The kinetics of the curing of poly (alkyltetrasulfide) was investigated rheologically by evaluating the viscoelastic material functions such as elastic storage modulus, and viscous loss modulus, during the curing process, isothermally. The isothermal kinetic reaction was described using three phenomenological equation based on the Kamal and Sourour model, gel times at various temperatures and a kinetic model developed by Hsich and co-workers. The rate of the reaction was found to be second order. The temperature dependence of the cross-linking rate constant was described by an Arrhenius plot with an apparent activation energy equal to 34 kJ/mol, using the temperature dependence of gel time, which is in reasonable agreement with the value obtained from the Kamal and Sourour and the Hsich models.
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