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  • 1
    facet.materialart.
    Unknown
    Rheology of composite solid propellants during motor casting (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: In a study conducted to evaluate flow parameters of uncured solid composite propellants during motor casting, two motors (1.8M-lb grain wt) were cast with a PBAN propellant exhibiting good flow characteristics in a 260-in. dia solid rocket motor. Attention is given to the effects of propellant compositional and processing variables on apparent viscosity as they pertain to rheological behavior and grain defect formation during casting. It is noted that optimized flow behavior is impaired with solid propellant loading. Non-Newtonian pseudoplastic flow is observed, which is dependent upon applied shear stress and the age of the uncured propellant.
    Keywords: PROPELLANTS AND FUELS
    Type: Internationale Jahrestagung ueber Analysenmethoden fuer Treib- und Explosivstoffe; Jun 14, 1978 - Jun 16, 1978; Karlsruhe; Germany
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    Rheology of composite solid propellants during motor casting (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Results of casting studies are reviewed so as to define the viscosity criteria insuring the fabrication of defect-free grains. The rheology of uncured propellants is analyzed showing that a realistic assessment of a propellant's flow properties must include measurement of viscosity as a function of shear stress and time after curing agent. Methods for measuring propellant viscosity are discussed, with particular attention given to the Haake-Rotovisko rotational viscometer. The effects of propellant compositional and processing variables on apparent viscosity are examined, as are results relating rheological behavior to grain defect formation during casting.
    Keywords: PROPELLANTS AND FUELS
    Type: Modern propellants and explosives technology; International Annual Meeting; Jun 14, 1978 - Jun 16, 1978; Karlsruhe
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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