Isothermal transformation of dynamic DSC curves for thermosetting polymers in curing kinetics analysis
Tóm tắt
To predict the isothermal course of a reaction from the dynamic DSC curves, the application of isothermal DSC curve transformation has been proposed. To perform such a transformation, it is sufficient only to determine the effective activation energy. To transform integral dynamic curves,α(T)), into isothermal ones,α(t), a better equation has been derived and its validity has been demonstrated on the example of two typical thermosetting systems. In addition, it has been shown that the transformation of differential curves, dα/dT (T), into isothermal ones dα/dt (α), readily allows determination of the kinetic function and rate constants. The procedure used to obtain information on the curing kinetics for thermosetting resins is characterized by simplicity and reliability and can work at E=E(α).
Tài liệu tham khảo
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