Changes of chemical and mechanical properties of double base propellants over artificial ageing
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60162694%3AG43__%2F13%3A00492704" target="_blank" >RIV/60162694:G43__/13:00492704 - isvavai.cz</a>
Result on the web
<a href="http://vavtest.unob.cz/registr" target="_blank" >http://vavtest.unob.cz/registr</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Changes of chemical and mechanical properties of double base propellants over artificial ageing
Original language description
Solid propellants are the part of an armament that is most liable to ageing processes. The most remarkable factor of ageing of double-base propellants (DB propellants) is temperature whereas increase of temperature by 10 °C causes around 2.9 times increase of the rate of chemical decomposition and the main role in the ageing act nitrocellulose (NC). Over ageing are not only split off radicals NO2 even at room temperature due to low activation energy of O-NO2 bond, but also cut chains of NC which means reducing of average molar mass. The lowering of average molar mass of linear polymer leads to lowering mechanical strength and to changes in other mechanical properties. The paper shows results of an experiment that was performed on propellants consistingof nitrocellulose, nitroglycerin and dinitrotoluen (DNT) and its alternative with replaced DNT by other plasticizer. Grains of propellants were artificially aged at 65 °C and 80 °C for a period corresponding to 5, 10, 15 and 20 years of
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
KA - Militarism
OECD FORD branch
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Result continuities
Project
<a href="/en/project/FR-TI4%2F290" target="_blank" >FR-TI4/290: *Solid propellants with limit burning rates</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of 16th seminar on New Trends in Research of Energetic Materials
ISBN
978-80-7395-605-9
ISSN
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e-ISSN
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Number of pages
8
Pages from-to
208-215
Publisher name
University of Pardubice
Place of publication
Pardubice
Event location
Pardubice
Event date
Jan 1, 2013
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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