EVALUATION OF PBEP, A HIGH-ENERGY BINDER.

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)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1966
Accession Number
AD0373521

Entities

People

  • Paul L. Allen

Tags

DTIC Thesaurus Topics

  • Autoignition
  • Catalysts
  • Chemical Properties
  • Efficiency
  • Elongation
  • Energy
  • Extrapolation
  • Flash Point
  • High Energy
  • Physical Properties
  • Propellants
  • Sensitivity
  • Specific Impulse
  • Tensile Properties
  • Test And Evaluation

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Rocket Propulsion.