Accession Number : AD0373521

Title :   EVALUATION OF PBEP, A HIGH-ENERGY BINDER.

Descriptive Note : Final rept. 1 Mar 65-28 Feb 66,

Corporate Author : UNITED TECHNOLOGY CENTER SUNNYVALE CALIF

Personal Author(s) : Allen ,Paul L.

Report Date : APR 1966

Pagination or Media Count : 110

Abstract : A PBEP/TVOPA/AP/AL propellant has been successfully scaled up to 1- and 4-lb motors. This formulation delivered 256.4 sec and 260.0 sec (0 half-angle, 1000 - 14.7 psi) in 1 - and 4-lb motors, respectively. This represented a specific impulse efficiency of 96.5% and 97.8% for the two motors. Extrapolation of the mass discharge curve predicts an efficiency of 98.2% at about 40 lb/sec mass discharge rate. Using the most pessimistic calculation method reduces these efficiencies by only 0.9%. Physical property evaluation gave a crosshead tensile of 110 psi and an elongation of 36.4%. Tensile properties were demonstrated to be easily variable by modifications of curative and catalyst. Hazard evaluation studies on the PBEP/TVOPA/AP/Al propellant gave impact values ranging from 9.0 to 14.2 kg-cm. Spark sensitivity of the propellant was greater than 10 joules. Autoignition values were 540 and 470 F for the 10-sec and 30-sec times. The card-gap sensitivity was greater than 119.6 cards in the micro card-gap test. (Author)

Descriptors :   (*SOLID ROCKET PROPELLANT BINDERS, PERFORMANCE(ENGINEERING)), SOLID PROPELLANT ROCKET ENGINES, CAPTIVE TESTS, TENSILE PROPERTIES, PHYSICAL PROPERTIES, HAZARDS, BALLISTICS, DIFFERENTIAL THERMAL ANALYSIS, COMPATIBILITY, CATALYSTS, AGING(MATERIALS) (U) SOLID ROCKET OXIDIZERS, FLUOROAMINES, ALKANES, AMMONIUM COMPOUNDS, SOLID ROCKET PROPELLANT PLASTICIZERS, PERCHLORATES, ALUMINUM COMPOUNDS, HYDRIDES, BERYLLIUM COMPOUNDS, AMINES, HYDRAZINE DERIVATIVES, BORON, NITRIDES, FLUORINE

Subject Categories : Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE