DETERMINATION OF INITIAL CRYSTALLINITY OF POLYETHYLENE TEREPHTHALATE USING DSC AND THE EXTRAPOLATED ENTHALPY TECHNIQUE

摘要

Samples of PET which are identical chemically but different in their thermal history are run by Differential Scanning Calorimetry (DSC). The initial crystallinity varies from 0% to 55%. The initial crystallinity is determined using a recently publicized method and newly available temperature dependent crystallinity software. This method employs enthalpy data from a thermodynamic data bank and DSC data obtained using a method to be described. The theory and practical application of the technique are presented.