چكيده لاتين :
Thermal an
d rheometric behaviours of SBR and BR are important in the curing of
rubbers. In this study, thermal analysis is used to determine the effect of carbon
black (GB) loadings on the reactivity of sulphur in curing reaction, rate constants
and heat capacities of rubbers. The heat capacities of SBR and BR are modelled at different
loadings of carbon black. This modelling is confirmed by the rheometric studies
of carbon black loadings effects on the activation energy of the curing process at different
temperatures. The allylic hydrogens of BR and SBR are used to explain the rate constants
and activation energies of the curing reactions. A semi-empirical relation is developed
for heat capacities of SBR and BR rubbers containing carbon black
