Pregled bibliografske jedinice broj: 83618
Influence of testing conditions on results of Arrhenius constants determination by non-isothermal isoconversional methods
Influence of testing conditions on results of Arrhenius constants determination by non-isothermal isoconversional methods // Forum Explosivstoffe 2002 / Wilker, Stephan (ur.).
Heimerzheim: WIWEB, 2002. str. 65-87 (pozvano predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
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Naslov
Influence of testing conditions on results of Arrhenius constants determination by non-isothermal isoconversional methods
Autori
Sućeska, Muhamed ; Mccarty, Jim ; Matečić Mušanić, Sanja ; Rajić, Maša
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
Forum Explosivstoffe 2002
/ Wilker, Stephan - Heimerzheim : WIWEB, 2002, 65-87
Skup
3. Internationaler Workshop Thermoanalyse des WIWEB
Mjesto i datum
Heimerzheim, Njemačka, 29.10.2002. - 30.10.2002
Vrsta sudjelovanja
Pozvano predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
Influence of testing conditions; of Arrhenius constants; non-isothermal isoconversional methods
Sažetak
The rate of thermal decomposition affects the quality of an energetic material, its shelf-life and thermal hazard potential. These are the most important practical reasons why one might wish to know accurately the mechanism and kinetics of the thermal decomposition process. Various experimental techniques and experimental conditions, various kinetic approaches and data treatments procedures have been applied in order to evaluate Arrhenius’ kinetic constants from experimental data. Consequently, the kinetic constants for an energetic material reported in literature may be in considerable disagreement. In this paper we studied the influence of some testing conditions on the values of Arrhenius kinetic constants derived using non-isothermal DSC measurements and the isoconversional kinetic approach described by Ozawa, and Flynn and Wall. Our attention was focused in particular on the analysis of the influence of sample self-heating phenomena on the calculated values of the activation energy and pre-exponential factor. The study, which was done on a double base gun propellant, has shown that these methods are capable of producing valid results for this material, provided that self-heating is minimised by adjustment of the experimental conditions. Calculated activation energy values varied from 130 to 216 kJ/mol, depending on testing conditions and data treatment procedure.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
