CTPB Back-up Propellant for SAM-D
Final rept. 1 Jun 1972-30 Jun 1975
MORTON THIOKOL INC HUNTSVILLE AL HUNTSVILLE DIV
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The objective of this program was to tailor a propellant using the CTPB binder system to meet SAM-D requirements, which would serve as a back-up to the present HTPB binder system propellant selected for Engineering Development. This CTPB propellant was formulated for optimum aging stability at 130F while maintaining adequate physical properties to meet -30F structural requirements. The initial SAM-D propellant was a CTPB formulation TP-H7038 which showed unacceptable softening during aging at 130F. It contained a trimodal blend including special coarse of AP oxidizer, and was formulated at a PCA ratio of 1.83 and a curing agent IE ratio of 5.1. The approach was modified to delete the special coarse AP whose internal moisture was the probable source of aging degradation from the TP-H7038 formulation. Substitution of additional unground AP for the special coarse AP, and adjustment of the aluminum particle size allowed the desired burning rate to be achieved. Initial propellant tensile properties were better than both TP-H7038 baseline and TP-H7070 propellant properties. Aging properties were significantly improved after 130F storage.
- Surface-Launched Guided Missiles
- Solid Rocket Propellants