G - Physics – 01 – K
Patent
G - Physics
01
K
150/19
G01K 17/00 (2006.01) G01N 25/50 (2006.01)
Patent
CA 1106268
Abstract A non-adiabatic calorimetric method and apparatus for quantifying the reaction kinetics of thermally unstable chemically reactive materials based on a distinguishing mode of establishing, under near steady state conditions, a thermal gradient across a sample of the chemically reactive material contained between a pair of surfaces maintained at different temperatures, stepwise or rampwise increasing the temperature of one of the surfaces, and quantifying and recording the maximum temperature that is withstood by the sample material at the inception of a self-sustaining exothermic runaway reaction. The critical temperature of the higher temperature surface is recorded as a function of the lower temperature surface, i.e., the applied thermal gradient. At least two such critical differential surface temperatures, which are required for calculations, are generated by repeating the experi- ment under differing temperature conditions. Solution of the steady-state differential equation describing the system, utilizing the experimental data, yields the general kinetics of the runaway reaction of the tested sample material. The known kinetics allow prediction of the unsteady-state adiabatic or non-adiabatic thermal runaway reaction of the sample for any condition of processing or use. 27,655-F
329657
Pate Kevin T.
Timm Edward E.
Smart & Biggar
The Dow Chemical Company
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