Accession Number : AD0716825

Title :   A Computer Method for the Thermogravimetry of Ablative Plastic Materials. Empirical Kinetics and Thermogram Construction.

Descriptive Note : Technical rept. Mar 69-Mar 70,

Corporate Author : DAYTON UNIV OHIO RESEARCH INST

Personal Author(s) : Olson,N. J.

Report Date : OCT 1970

Pagination or Media Count : 49

Abstract : 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 tape/plotter 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)

Descriptors :   (*THERMOGRAVIMETRIC ANALYSIS, COMPUTER PROGRAMS), (*COMPUTER PROGRAMS, *THERMAL ANALYSIS), (*DIFFERENTIAL THERMAL ANALYSIS, COMPUTER PROGRAMS), REACTION KINETICS, ABLATION, PLASTICS, IMIDES, PLOTTERS

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE