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Wyświetlanie 1-2 z 2
Tytuł:
Determination of Nitroglycerine Content in Double Base Propellants by Isothermal Thermogravimetry
Autorzy:
Fiamengo, I.
Sućeska, M.
Matečić Mušanić, S.
Powiązania:
https://bibliotekanauki.pl/articles/357942.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
thermal methods
thermogravimetry
identifcation
homogeneous propellants
double based propellants
nitroglycerine content
Opis:
Thermal methods play an important role among various measuring techniques used in the analysis of explosive materials. These methods are mostly used for the investigation and determination of thermal properties of energetic materials (e.g. melting process, polymorphic transformations, temperature of initiation, etc.), as well as to estimate thermal stability, and to study thermal decomposition. Furthermore, thermal methods can be also used for analytical purposes, such as identifcation of some commonly used high explosives, determination of their purity, determination of phlegmatiser content, etc. The aim of this work was to study the possibility of application of isothermal and non-isothermal thermogravimetry for determination of nitroglycerine content in double based propellants. It has been found out that thermogravimetry can be used not only to distinguish clearly between nitrocellulose and double based propellants, but also for rough determination of nitroglycerine content in double based propellants. The difference between an actual and experimentally determined content of nitroglycerine in double based propellants (i.e. accuracy of the method) is dependent on composition of propellant and data treatment method.
Źródło:
Central European Journal of Energetic Materials; 2010, 7, 1; 3-19
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Mechanical Properties of Naturally Aged Double Base Rocket Propellants
Autorzy:
Sućeska, M.
Matečić Mušanić, S.
Fiamengo, I.
Bakija, S.
Bakić, A.
Kodvanj, J.
Powiązania:
https://bibliotekanauki.pl/articles/357946.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
mechanical properties
rocket propellant
natural ageing
dynamic mechanical analysis
tensile test
Opis:
Various chemical reactions and physical processes (such as stabilizer consumption, migration and evaporation of nitroglycerine, decomposition of nitroglycerine and nitrocellulose, etc.) take place in double based rocket propellants grains over the time, even under ambient storage conditions. The overall effect of these reactions and processes are changes of physical, chemical, thermal, ballistic and mechanical properties of rocket propellants with storage time, i.e. the reduction of the propellants performances and safe service life. The aim of this work was to evaluate the mechanical changes of rocket propellants – sustainers, built in in-service antitank guided missiles systems, induced by natural ageing at ambient conditions during up to 35 years of storage. The mechanical and viscoelastic properties were tested using a dynamic mechanical analyser, an uniaxial tensile and compression tester, and a notch toughness tester. The results have shown that the changes of the studied mechanical and viscoelastic properties are evident, although the results of the tests are rather scattered (as a consequence of measuring uncertainty, different ageing histories of propellants, etc.) or changes of some properties are not too pronounced. For example, after 15 years of storage at ambient conditions the glass transition temperature increases for about 5 C, the tan δ in the glass transition region decreases for about 5%, the storage and loss modulus at 25 °C increase for about 15%, Young modulus at 23 C increases up to 30%, the notch toughness at -30 C decreases up to 15%, etc. Along with these tests, the stabilizer content determination and proving ground ballistic tests were also done.
Źródło:
Central European Journal of Energetic Materials; 2010, 7, 1; 47-60
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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