Abstract

The present study examines the transformation of dynamic DSC data into the equivalent isothermal data for the formation kinetics of a polyurethane elastomer. The reaction of 2'-dichloro-4,4'-methylenedianiline (MOCA) with a PTMG/TDI-based isocyanate prepolymer was evaluated. DSC measurement was performed in the dynamic scanning mode with several different heating rates to obtain the reaction thermograms. Then, the data was transformed into the isothermal data through a procedure based on Ozawa analysis. The main feature of this procedure was the transformation of (α−T)_β curves from dynamic DSC into (α−t)_T curves using the isoconversional (t−T)_α diagram. Validity was discussed for the relationship between the dynamic DSC data and the transformed isothermal results.

Keywords: cure kinetics;polyurethane elastomer;dynamic DSC;isothermal transformation