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国际能源材料和化学驱动期刊

每年出版 6 

ISSN 打印: 2150-766X

ISSN 在线: 2150-7678

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.7 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 0.7 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00016 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.18 SJR: 0.313 SNIP: 0.6 CiteScore™:: 1.6 H-Index: 16

Indexed in

ON CHEMICAL KINETICS OF THE IGNITION OF AP / NSAN / INERT BINDER COMPOSITE PROPELLANTS

卷 4, 册 1-6, 1997, pp. 793-803
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v4.i1-6.740
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摘要

This work concerns the ignition behaviour of ammonium perchlorate / non-stabilized ammonium nitrate / hydroxyl terminated polybutadyene and ammonium perchlorate / non-stabilized ammonium nitrate / polyurethane composite propellants. All the compositions were formulated with 80 % by weight of solid oxidant mass and 20 % by weight of bulk (pre-polymer, plasticizer and curing agent) binder system. In both type of compositions the cases 0 %, 20%, 40 % and 60 % of non-stabilized ammonium nitrate weight content, of the total solid mass, were studied.
The experimental apparatus used in this work for the measurement of ignition delays of the propellants, in ambient air and at atmospheric pressure, was composed of an electrical furnace, a pneumatic system for rapid introduction of the propellant samples and peripheral devices allowing real time control of the process and data acquisition.
The results obtained showed that increasing non-stabilized ammonium nitrate content caused shorter values of the ignition delay. Further interpretation of the experimental data was made assuming a first order rate controlling reaction, with constant reactants' consumption during the pre-ignition period. As the calculated values of the activation energy in the lower temperature range were always lower than those obtained for the higher experimental temperature, this type of evolution indicated that the ignition mechanism of this type of composite propellants could be described in two independent phases, corresponding Phase I to the occurrence of heterogeneous ignition reactions while homogeneous gas phase ignition reactions were characteristic of Phase II. The transition temperatures between Phases I and II were calculated. The results obtained demonstrate clearly that partial substitution of ammonium perchlorate by non-stabilized ammonium nitrate in the propellants' formulation shifts the transition temperature to lower levels, increasing in this way the domain of occurrence of homogeneous ignition.

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