It was observed, as the number of reactive functional groups (susceptible to ROP) in a monomer increases, onset of curing temp. decreases. However what is their correlation with Ea value prediction using DSC, if any?
The onset of any reaction is a equilibrium phenomenon and activation energy is a kinetic phenomenon. You cannot just conclude by just with onset temperature. The onset temperature decreased in your case only due to the increase in the number of reactive function group..and may not because of the increase in activation energy. However, you can prove by computing the activation energy of the curing processes of your different polymers and by carrying out DSC experiments at different heating rates and conclude find out whether the activation energies of polymer with polymers containing larger number of reactive groups are really higher than that of its lower counterparts
Many thanks Raghavendran for the valuable comments. I did DSC at different heating rates and from DSC results I got Ea which is not in agreement with To values. But To values agrees well with number of functional groups
Therefore, What that actually means is that variation in the onset temperature is a chemical phenomenon and is not a kinetic phenomenon. By the way, my name is
Dr. R. Venkata Krishnan and not Raghavendran..
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