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Aging Behavior of Propellants investigated by heat generation, stabilizer consumption, and molar mass degradation
Author(s) -
Bohn Manfred A.,
Volk Fred
Publication year - 1992
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.19920170405
Subject(s) - molar mass , stabilizer (aeronautics) , isothermal microcalorimetry , propellant , chemistry , degradation (telecommunications) , heat generation , base (topology) , rocket propellant , arrhenius equation , materials science , polymer chemistry , analytical chemistry (journal) , chromatography , activation energy , organic chemistry , thermodynamics , enthalpy , polymer , telecommunications , engineering , mechanical engineering , mathematical analysis , physics , mathematics , computer science
Four double‐base rocket propellants and a single‐base gun propellant were tested to find out stabilizer consumption molar mass degradation, and heat generation between 50 °C and 90 °C and between 40 °C and 110 °C, respectively. Stabilizer depletion was measured by high performance liquid chromatography (HPLC), molar mass degradation by gel permeation chromatography (GPC), and heat generation by microcalorimetry. The conditioning times at different temperatures were determined with one of the rocket propellants, and the influence of the long‐term storage on heat generation at 60 °C for 2191 dys was investigated. A correlated experiment between stabilizer consumption and heat generation showed that heat production does not increase substantially until the stabilizer has been consumed almost completely. The experimental data of molar mass degradation are described by a kinetic model based on statistical chain scission, and the stabilizer decrease by a first order reaction. For the gun propellant the Arrhenius plots of the reaction rate constants show two temperatures of teh stabilizer consumption, molar mass degradation and heat generation were determined.