Temperature-modulated DSC applied to the transformation kinetics of polymer crystallization

Temperature-modulated differential scanning calorimetry (T-MDSC) has been a pplied to the isothermal crystallization of poly(vinylidene fluoride), isot actic polypropylene, syndiotactic polypropylene, poly(ethylene terephthalat e), poly(caprolactam) and poly(ethylene succinate). It has been confirmed t hat the imaginary part of the apparent heat capacity determined by T-MDSC g ives the temperature dependence of linear growth rate. The proper choice of the baseline for the phase angle of the complex heat capacity has been dis cussed and it is concluded that the change in the crystallinity evaluated f rom the integration of mean exothermic heat flow can be used as the baselin e.