Journal ArticleDOI
Comparison of thermal degradation behavior of epoxy/ammonium perchlorate composite propellants
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TLDR
In this article, the thermal degradation process of epoxy/ammonium perchlorate (EP/AP) composites was studied by thermogravimetric (TG) analysis and differential scanning calorimetry.Abstract:
Non-isothermal degradation process of different mass ratios of epoxy/ammonium perchlorate (EP/AP) composites was studied by thermogravimetric (TG) analysis and differential scanning calorimetry. TG data were treated with AKTS-Thermokinetics software, Flynn–Wall–Ozawa and Friedman’s isoconversional methods for measuring the variation of apparent activation energy (E
a) with degree of conversion (α). It was found that thermal degradation process of EP/AP composites is complex, and theirs thermal degradation temperatures are lower than that for epoxy and ammonium perchlorate (AP). The obtained results showed that the degradation activation energy of the EP/AP composites is equal or higher than that for epoxy at the beginning of the degradation. The most interesting finding was that epoxy resin can shift high-temperature decomposition peak of AP to a lower temperature. Self-accelerating decomposition temperature (T
SADT) and explosion critical temperature (T
b) of EP/AP composites were determined to evaluate the thermal stability of the samples. Finally, lifetime prediction of the samples was done by AKTS software.read more
Citations
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Synergistic effects of amine-modified ammonium polyphosphate on curing behaviors and flame retardation properties of epoxy composites
TL;DR: In this article, the 4,4′-diaminodiphenylmethane (DDM) was used as both curing agent and charring agent for the surface modification on the ammonium polyphosphate (APP), and their epoxy composites were prepared.
Journal ArticleDOI
ICTAC Kinetics Committee recommendations for analysis of thermal decomposition kinetics
Nobuyoshi Koga,Sergey Vyazovkin,Alan K. Burnham,Loïc Favergeon,Nikita V. Muravyev,Luis A. Pérez-Maqueda,Chiara Saggese,Pedro E. Sánchez-Jiménez +7 more
TL;DR: In this paper , the authors present a collection of recommendations for the kinetic analysis of thermal decomposition processes in inorganic, organic, and polymeric materials, as well as biomass and solid fuels.
Journal ArticleDOI
Thermokinetic studies of polyurethanes based on hydroxyl-terminated polybutadiene prepolymer
TL;DR: In this article, three different polyurethane compositions were prepared based on hydroxyl-terminated polybutadiene (HTPB) prepolymer with different curative types.
Journal ArticleDOI
Analysis of kinetics of thermal decomposition of melamine blended with phosphorous ionic liquid by green approach
TL;DR: In this paper, a novel synergistic flame retardant was prepared through an easy operated physical mixing, and pyrolysis behavior of melamine and its compounds were measured using thermogravimetric analysis.
Journal ArticleDOI
Functionalization graphene oxide with energetic groups as a new family of metal-free and energetic burning rate catalysts and desensitizers for ammonium perchlorate
TL;DR: A new family of metal-free and energetic graphene oxide (GO)-based burning rate catalysts (FGO 1-6) with excellent catalytic and desensitization performances for ammonium perchlorate (AP) were synthesized by nucleophilic substitution reaction of energetic functional groups with acylated GO as mentioned in this paper.
References
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Journal ArticleDOI
A New Method of Analyzing Thermogravimetric Data
TL;DR: In this paper, a new method of obtaining the kinetic parameters from thermogravimetric curves has been proposed, which is simple and applicable to reactions which can not be analyzed by other methods.
Journal ArticleDOI
ICTAC Kinetics Committee recommendations for performing kinetic computations on thermal analysis data
Sergey Vyazovkin,Alan K. Burnham,José M. Criado,Luis A. Pérez-Maqueda,Crisan Popescu,Nicolas Sbirrazzuoli +5 more
TL;DR: In this article, the authors have developed recommendations for reliable evaluation of kinetic parameters (the activation energy, the preexponential factor, and the reaction model) from the data obtained by means of thermal analysis methods such as TGA, differential scanning calorimetry (DSC), and differential thermal analysis (DTA).
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Variation of Peak Temperature With Heating Rate in Differential Thermal Analysis
TL;DR: In this article, the temperature at which the maximum deflection is observed varies with heating rate for certain types of reactions, and an expression can be derived relating this variation with the kinetics of the reaction.
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Kinetics of thermal degradation of char-forming plastics from thermogravimetry. Application to a phenolic plastic
TL;DR: In this article, a technique was devised for obtaining rate laws and kinetic parameters which describe the thermal degradation of plastics from TGA data, based on the inter-comparison of experiments which were performed at different linear rates of heating.