ELASTOMERIC INSULATION FOR SOLID PROPELLANT ROCKET MOTORS
ROCK ISLAND ARSENAL IL
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The development of flexible, elastomeric-based, solid propellant rocket motor case insulation is discussed. The effect on insulation properties of type of asbestos, of liquid versus solid elastomers, and of methods of dispersing fibrous compounding ingredients are reported. Oxyacetylene torch and static motor firing test data for some of the better insulation materials developed, as well as for some commercial materials, are presented. A material with 40 percent elongation, 1,34 gmcc density, performance index of 95 sq cm secgm and erosion rate of 2.0 milssec was the most promising insulation developed. The material is a 5545 butadieneacrylonitrile compound containing phenol furfural resin, asbestos and oxyazoline wetting agent. It was satisfactorily bonded to aluminum and to steel by conventional bonding agent. The thermal properties of this vulcanizate are not affected by oven aging for one week at 70C.
- Solid Propellant Rocket Engines