Remarks on the Calorimetry Studies

From the recent knowledge, the following stages should be considered  

Either in isothermal or in scanning calorimetry, the temperature of the rubber increases. 

Heat evolves from the exothermic curing reaction as soon as the temperature is high enough this heat is responsible for another increase in temperature of the rubber. 

A heat flux is thus emitted from the rubber surface to the surface of the calorimeter, according to Equation 1.18. Finally, the unit should be W/ cm for the given characteristics of the rubber sample in the calorimeter. This heat flux increases up to a maximum value associated with the top of the peak, and then decreases down to the base line. 

The cure enthalpy is obtained from the area under the curve expressing the variation of the heat flux as a function of either time with isothermal calorimetry or temperature in scanning calorimetry. The integration of the heat flux given in Equation 1.18 leads to  

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