PCDE Propellant Studies.

Authors: Anthony J. Di Milo; AEROJET SOLID PROPULSION CO SACRAMENTO CALIF

Abstract:

PCDE-TMETN formulations contained 79 wt% solids consisting of a 2 to 1 mixture of HMX and AP and 18 wt% Al and 21 wt% binder having PCDE and plasticizer in a 1 to 1 weight ratio. This baseline formulation has a calculated density of 0.0685 lb/in., a theoretical specific impulse of 272.2 lbf-sec/lbm, and an expected delivered specific impulse of 260.1 lbf-sec/lbm. Coated AP and HMX were used to achieve adequate mechanical behavior. Purification of PCDE and TMETN by passage through Linde molecular sieves improved mechanical properties of these propellants. The propellants were scaled up to 1- and 10-lb mixes. The propellants were more hazardous than conventional propellants, but sufficiently safe to handle. The BDNPA/F plasticized propellant, which was required to be Class 2, was initially based upon a formulation with 79 wt% solids, consisting of 53 wt% AP and 26 wt% Al, and 21 wt% binder having a 1 to 1 mixture of PCDE and BDNPA/F. All attempts to increase the performance of this propellant by the addition of small amounts of HMX, boron, or an aluminum-boron alloy removed the propellant from the required Class 2 category. The formulation was changed to one with 51 wt% AP, 22 wt% Al, and 27 wt% binder consisting of equal parts of PCDE and BDNPA/F. This formulation with a theoretical specific impulse of 263.4 lbf-sec/lbm is expected to deliver 250.8 lbf-sec/lbm. This propellant is Class 2. Buring rates exceeding 1.6 in./sec were obtained by incorporation of up to 20 wt% 0.5 micron AP.

Description:

Technical rept. 1 Sep 72-28 Feb 73

Pages:

177

Report Date:

APR 1973

Contract Number:

F0461172C0046

Report Number:

0614525

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