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    Wyświetlanie 1-3 z 3
    Tytuł:
    Composite Propellant Formulation of Poly (16-, 32- and 64-) Azido Dendritic Esters as Energetic Plasticizer and Evaluation of Properties
    Autorzy:
    Yamajala, Kanaka Durga Bhaskar
    Singh, Hema
    Kurva, Ramesh
    Maurya, Mehilal
    Banerjee, Shaibal
    Powiązania:
    https://bibliotekanauki.pl/articles/1062788.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    azido dendrimers
    energetic plasticizer
    composite propellant
    burning rate
    Opis:
    16-, 32- and 64-Polyazido hyperbranched dendrimers were synthesized from hydroxy terminated dendritic ester by following two steps namely, tosylation and azidation. The poly azido dendrimers were incorporated in composite propellant formulations as an energetic plasticizer. The physical, thermal sensitivity and ballistic properties of these composite propellants such as burning rate, Cal-val, density, ignition/decomposition temperature (AET), DSC-TGA, mechanical properties, impact and friction sensitivity were evaluated experimentally while the specific impulse (Isp) and characteristic velocity (C*) were obtained theoretically. A significant enhancement in heat release was noted in the propellant formulation having 16-azido dendritic ester as an energetic plasticizer compared to 32- and 64-azido dendritic esters and a reference composition.
    Źródło:
    Central European Journal of Energetic Materials; 2020, 17, 4; 506-522
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Designing a Highly Energetic PCL-GAP-PCL-based PU Elastomer; Investigation of the Effect of Plasticizers on Its Properties
    Autorzy:
    Chizari, Mostafa
    Bayat, Yadollah
    Powiązania:
    https://bibliotekanauki.pl/articles/358502.pdf
    Data publikacji:
    2019
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    polyurethane elastomer
    glycidylazide polymer
    binder
    energetic plasticizer
    mechanical properties
    thermal properties
    Opis:
    Glycidylazide polymer (GAP) has potential interest for the development of high-performance energetic propellants. Although GAP is a well-known and promising energetic polymer, propellants based on it suffer from poor mechanical and low-temperature properties. In order to improve the mechanical and thermal properties of GAP a promising idea would be the preparation of a tri-block copolymer of it with a polymer having good mechanical and thermal properties, such as polycaprolactone (PCL). In this work, we report a detailed investigation of the glass transition temperature (Tg) and viscosity of PCL-GAP-PCL samples incorporated with energetic plasticizers, BuNENA, TMETN, and BTTN. The results demonstrated that the Tg of PCL-GAP-PCL is influenced by the type of plasticizer. PCL-GAP-PCL was cured with TDI and a mixed curing system (IPDI/N100). The elastomer prepared with the mixing curing system showed excellent mechanical properties with 2.64 MPa and 138% elongation. The effects of the energetic plasticizers on the mechanical properties of the elastomer were investigated. Finally, the plasticized tri-block copolymer showed enhanced mechanical and thermal properties.
    Źródło:
    Central European Journal of Energetic Materials; 2019, 16, 1; 33-48
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    N-Nitropyridinium Nitrate: An Efficient Nitrating Agent for the Synthesis of 2-[Butyl(nitro)amino]ethyl Nitrate (n-BuNENA)
    Autorzy:
    Bayat, Y.
    Esmailmarandi, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/358046.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    2-[butyl(nitro)amino]ethyl nitrate (n-BuNENA)
    zeolite
    N-nitropyridinium nitrate
    plasticizer
    energetic material
    Opis:
    The present investigation focused on the synthesis of 2-[butyl(nitro)amino]ethyl nitrate (n-BuNENA), by the nitration of N-butylethanolamine. For this purpose, various nitrating agents were studied and N-nitropyridinium nitrate was found to be a good nitrating agent. Short reaction time, ease of handling, performance of the reaction in one step and good yield are the main aspects of the present method. It also lead to 75% yield, which is a higher yield than by other methods. The purity of the product was evaluated by HPLC analysis, and its identity was confirmed by IR and 1H NMR spectroscopy.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 4; 838-844
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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