Defence R & D Organization, SF Complex, Jagdalpur-494 001.
To study the rheological properties and the flow behaviour of HTPB based composite propellant, a typical mix was carried out with 86 per cent solid loading and toluene diisocynate (TDI) as curator. Viscosity of the propellant slurry was measured at different shear rates over a range of temperature from 40°C to 60°C at various time intervals up to five hours from end of mix. The data are analysed using power law fluid equation to determine the viscosity index (K) and pseudoplasticity index (m). From these, optimum casting temperature and useful pot life was evaluated. Casting rates at different temperatures were determined by Haegen-Poisseuille equation modified for non-Newtonian fluid flow, using K and m.
Composite solid propellants, rheological behaviour, casting rate, HTBP-based composites, solid propellants, propellant grain, propellant flow, pseudoplasticity
