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• W1973007829 abstract "The first semi-micro kinetics analysis is described for rapid pyrolysis of an organic polymer. T-Jump/FTIR spectroscopy and structurally different hydroxyl-terminated polybutadiene polymers (HTPB) were used. The rates of formation were determined for the six most prevalent volatile products from HTPB heated at 600°C/s to constant temperatures in the 450°–609°C range under 2 and 11 atm of applied pressure. The resulting Arrhenius parameters reveal that mildly exothermic, bulk-phase, heterogeneous decomposition reactions control the rate of gaseous product evolution at T < 500°–530°C under 2 atm Ar. The exact temperature depends on the product and the polymer microstructure. The rate evolution of most of the gaseous products at T > 500°–530°C is controlled by desorption of fragments of the polymer rather than bulk-phase decomposition. When P = 11 atm Ar, the formation and desorption of these fragments controls the rate of product of evolution over the entire 460°–600°C range. These individual rate constants combined into a single rate yield macro kinetics of gas evolution from R45M as follows: Ea = 51 kcal/mol, ln A (s−1) = 31 for 2 atm and 450°–530°C; Ea = 18 kcal/mol, ln A (s−1) = 11 for 2 atm and 530°–609°C; Ea = 12 kcal/mol, ln A (s−1) = 6.6 for 11 atm and 460°–600°C. A generalized equation that qualitatively matches the kinetics of gaseous product evolution as a function of pressure is given." @default.
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• W1973007829 creator A5031732910 @default.
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• W1973007829 date "1996-07-01" @default.
• W1973007829 modified "2023-10-18" @default.
• W1973007829 title "Flash pyrolysis of hydroxyl-terminated polybutadiene (HTPB) II: Implications of the kinetics to combustion of organic polymers" @default.
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• W1973007829 doi "https://doi.org/10.1016/0010-2180(95)00254-5" @default.
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