In my lab. I prepared a difunctional monomer, which contains two similar vinylic groups. Is there more than one exotherm that represents the homopolymerization and crosslinking polymerization reactions.
I guess more information is needed, like the monomer name/chemical structure or the thermogram (if you have it already). Processing/curing parameters are also desirable.
I have a comment and more questions regarding the thermograph. First the comment: it seems to me that exotherm at 180°C is a curing, may be post curing process. This comment is based mainy on the change of baseline, which means a phase change has happened. I don't know what happens on your monomer at 200°C and vaccum, since I wasn't able to find any data when doing a fast search. Questions are: Is your monomer a liquid or solid? If a liquid, what kind of pan/crucible was used? What's the volume/weight tested at DSC? did you asked for a heat-cool-heat program cycle? Can you ask/perform a FTIR-ATR on the monomer and/or the DSC adduct(crucible tear down)? The more the answers, the better the hints such enthalpy is happening. PS: Consider also the stress your sample could suffer during shipping.
The monomer is solid. The FT-IR of the monomer after curing showed that the polymerization reaction had occurred.
Dear Habib, I guess you cannot distinguish the polymerization from the cross-linking reaction. Both process are simultaneously and the difference are not big anough for this method. If you want to know which vinylic group has reacted and in which case, you need a stronger method like NMR.
But for what information you are looking for?
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