Determination of plastoviscosity and the flow curve equation of stiff pastes by parallel plate plastometry

  • W. A. Dukes
  • Virginia M. Gledhill


Plastic propellant is a stiff paste typically containing (by weight) 89% solids (ammonium perchlorate and perhaps aluminium and a burning catalyst), 1% synthetic surface-active agent and 10% polyisobutene. The polyisobutene has a nominal viscosity-average molecular weight of about 4 × 104 and a viscosity of about 100 kN/m2 (106 poise) at 25 °C, when measured at a very low shear-rate by the falling sphere (Stokes) method. The paste is similar to modelling clay or Plasticine, and may be considered to a first approximation as a Bingham solid subject to shear-hardening (1).


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1).
    Dukes, W. A., Determination of the Yield Stress of Stiff Pastes by Parallel Plate Plastometry; Proc. 5th Int. Congress on Rheology, ed. S. Onogi, Vol. 2, p. 315 (Tokyo 1970).Google Scholar
  2. 2).
    Fox, T. G., S. Gratch, and S. Loshaek, Viscosity Relationship for Polymers. In: F. R. Eirich, (Ed.), Rheology, Vol. 1, p. 431 ff. (New York 1960).Google Scholar
  3. 3).
    Ward, A. G. and P. R. Freeman, J. Sci. Inst. 25, 387 (1948).ADSCrossRefGoogle Scholar
  4. 4).
    Bueche, F., J. Chem. Phys. 48 (10), 4781 (1968).ADSCrossRefGoogle Scholar
  5. 5).
    Cross, M. M., J. Appl. Polymer Sci. 13, 765 (1969).CrossRefGoogle Scholar
  6. 6).
    Cross, M. M., J. Colloid Interf. Sci. 33 (1), 30 (1970).CrossRefMathSciNetGoogle Scholar
  7. 7).
    Meyerhof, G. G. and T. K. Chaplin, Brit. J. Appl. Phys. 4, 20 (1953).ADSCrossRefGoogle Scholar
  8. 8).
    Dienes, G. J. and H. F. Klemm, J. Appl. Phys. 17, 458 (1946).ADSCrossRefGoogle Scholar
  9. 9).
    Dienes, G.J., J. Colloid. Sci. 2, 131 (1947).CrossRefGoogle Scholar
  10. 10).
    Oka, S., Principles of Rheometry. in: F. R. Eirich (Ed.), Rheology, Vol.3, p. 73 ff. (New York 1960).Google Scholar
  11. 11).
    Reiner, M. and G. W. Scott Blair, Rheological Terminology. In: F. R. Eirich (Ed.), Rheology, Vol. 4, p. 480 (New York 1967).Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1975

Authors and Affiliations

  • W. A. Dukes
    • 1
  • Virginia M. Gledhill
    • 1
  1. 1.Ministry of Defence (PF)Waltham Abbey, EssexEngland

Personalised recommendations