Use of differential scanning calorimetry to study polymer crystallization kinetics

The use of differential scanning calorimetry to determine accurate crystallization parameters is reconsidered by direct comparison with dilatometry. Two calorimeters are compared: Perkin-Elmer DSC models 1B and 2. Fractions of polyethylene are studied since their rate constants have a marked temperature dependence which enables the accuracy of setting and calibrating the temperature of the calorimeters to be gauged. The resolutions of the calorimeters are compared from their abilities to detect secondary crystallization. The limitations of d.s.c. and the choice of operating conditions are discussed.