You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.


    Obtaining Kinetic Parameters Using Modulated Temperature

    Published: Jan 2001

      Format Pages Price  
    PDF () 14 $25   ADD TO CART
    Complete Source PDF (3.8M) 14 $91   ADD TO CART


    Flynn and Dickens demonstrated in 1976 that continuous kinetic information may be derived from thermogravimetry profiles using a periodic temperature square wave signal. Blaine extended this approach to the sine wave. Extension of the sine wave approach to differential scanning calorimetry, however, requires consideration of the effects of the heat capacity heat flow, not present in thermogravimetry. The heat capacity term is always present and is theoretically 90° out of phase with the kinetic heat flow. Sine wave signals of the same period, however, add together to produce a sine wave of intermediate phase. To understand the effects of these mixed signals, a partial series of models is proposed for modeling pure crystalline and polymer melts on the way to a more complete understanding and measurement of kinetic parameters.


    differential scanning calorimetry, kinetics, melting, modulated temperature, thermogravimetry

    Author Information:

    Blaine, RL
    Applications manager, TA Instruments, Inc., New Castle, DE

    Committee/Subcommittee: E37.01

    DOI: 10.1520/STP10704S

    CrossRef ASTM International is a member of CrossRef.