Abstract
The heat release kinetics in thermally initiated polymerization of 1,4-diethynylbenzene suggested as fuel dispersant in gas generator engines was studied under isothermal conditions in the temperature interval 90–150°С in the melt–vapor two-phase closed system. The enthalpies and entropies of melting, vaporization, and sublimation of 1,4-diethynylbenzene and the kinetics of a decrease in its vapor pressure in the course of polymerization in the melt were determined. Specific features of pressure and temperature variation in the course of propagation of the 1,4-diethynylbenzene combustion front in a cylindrical specimen in a Crawford bomb at the initial pressure of 2 MPa were studied.
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Funding
The study was financially supported by the Institute of Problems of Chemical Physics, Russian Academy of Sciences, themes 0089-2019-0005 (state registry no. АААА-А19-119101690058-9), Basic and Problem-Oriented Research in the Field of the Development of Energetic Condensed Systems (ECSs) for Various Purposes, and 0089-2019-0017 (state registry no. АААА-А19-119100800130-0), Complex Basic and Problem-Oriented Research in the Field of Physics and Chemistry of Combustion and Heat and Mass Exchange of High-Energy-Capacity Solid and Liquid Fuels and Materials of New Generation for High-Temperature Ramjet Combustion Chambers.
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A.I. Kazakov: analysis of published data on thermally initiated 1,4-diethynylbenzene polymerization, processing of experimental data on the heat release and on a decrease in the vapor pressure in 1,4-diethynylbenzene polymerization, and writing of Introduction and sections concerning the procedure for studying the heat release rates, the kinetic of the heat release in thermally initiated 1,4-diethynylbenzene polymerization, the temperature dependence of the 1,4-diethynylbenzene vapor pressure, and the kinetics of its decrease in the course of 1,4-diethynylbenzene polymerization in the melt; D.B. Lempert: suggestion of using 1,4-diethynylbenzene as a dispersant and participation in setting the tasks and formulating the conclusions of the study; A.V. Nabatova: experiments on the determination of the heat release rates in 1,4-diethynylbenzene polymerization and computer processing of the data obtained; T.S. Larikova: experiments on determining the 1,4-diethynylbenzene vapor pressure and the kinetics of its decrease in the course of polymerization; A.A. Molokanov: processing of experimental data on the temperature dependence of the 1,4-diethynylbenzene vapor pressure and calculation of changes in the thermochemical parameters upon phase transitions; I.N. Zyuzin: preparation of 1,4-diethynylbenzene samples for the studies and writing of the Experimental section; N.N. Volkova: processing of the experimental data on the high-temperature conversion of 1,4-diethynylbenzene, collection of the literature, writing of the sections concerning relationships of the pressure and temperature variation in 1,4-diethynylbenzene combustion and, in part, procedure for studying the heat release rates; M.B. Kislov and A.F. Zholudev: experiment on studying the macrokinetic relationships of the 1,4-diethynylbenzene combustion in the constant-pressure bomb; L.S. Yanovskii: participation in setting the tasks of the study.
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Translated from Zhurnal Prikladnoi Khimii, No. 7, pp. 927–936, January, 2021 https://doi.org/10.31857/S004446182107015X
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Kazakov, A.I., Lempert, D.B., Nabatova, A.V. et al. Heat Release Kinetics in Thermally Initiated 1,4-Diethynylbenzene Polymerization. Russ J Appl Chem 94, 977–985 (2021). https://doi.org/10.1134/S1070427221070168
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DOI: https://doi.org/10.1134/S1070427221070168