DSC methods:
The DSC methods are more sensitive than DTA and it provides clear presence of a thermal events occurring during course of heating of time ageing of material. Therefore, the information acquired through DSC is more realistic. The method is used for the presence of polymorphism, degree of crystallinity, curing fraction etc. Curves clearly denote in which Figure is showing the peaks for the glass transition, ordering, melting and decomposition of individual polymers. The ratio of areasunder the curve through dividing the enthalpy of heat of decomposition provides the ratio of individual monomers in a analysed copolymer sample.
The heat of reaction (?Hr) observed in DSC could be further used to calculate molar enthalpy of reactions through using subsequent formula:
?Hm = ?Hr × Mr /m
Where, (?Hm = molar enthalpy of reaction,
?Mr = relative molar mass of analysed compound,
m = Mass of substance used for analysis.