A Computer Method for the Thermogravimetry of Ablative Plastic Materials. Empirical Kinetics and Thermogram Construction.
Technical rept. Mar 69-Mar 70,
DAYTON UNIV OHIO RESEARCH INST
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This report reviews the primary computer code TRIM which is used to calculate the empirical kinetic parameters from the integral weight and temperature values derived from the experimental thermogram. The magnetic tapeplotter subroutine PAR-3 IS THEN DISCUSSED IN DETAIL. This subroutine constructs a thermogram from parameters generated by the code TRIM. An analysis was made for a polyimide resin run at four rates of heating for purposes of illustration. Calculated and experimental residual weights were compared at selected temperatures. The values generally agreed within 1 over most of the thermogram with a maximum error of 2 -6. There was a trend for lower maximum error at the higher heating rates. Author, modified-PL
- Physical Chemistry