Accession Number:

ADA592051

Title:

BH3-Amine and B(CH3)3-Amine Adducts as Additives for Liquid/Gel Hypergols and Solid Hybrid Rocket Motor Fuels: Property and Performance Predictions

Descriptive Note:

Final rept. Oct 2012-Sep 2013

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE

Personal Author(s):

Report Date:

2013-12-01

Pagination or Media Count:

38.0

Abstract:

BH3-amine and BCH33-amine adducts were investigated as potential additives for rocket-propellant formulations. The investigation included the calculation of property predictions for a variety of known and notional adducts. Property predictions were based on results from quantum chemistry methods. Predicted gas-phase properties included B-N bond dissociation energies BDEs and enthalpies of formation at 298 K DeltafHg298. Predicted condensed-phase properties included enthalpies of sublimation DeltaHs298, enthalpies of formation at 298 K DeltafHc298, and densities rho. Values for these properties that were derived from measured data or higher-level computational methods were also obtained from open literature sources. In the course of the literature search, assessments of the thermal andor air stabilities of some adducts were identified, and an attempt was made to correlate them with B-N BDEs. The DeltafHc298 estimates were employed as input for thermochemical code-based calculations of the specific impulse that adducts could potentially generate when combined with inhibited red fuming nitric acid. Results from the study indicate that several BH3-amine adducts warrant further investigation as additives for liquidgel hypergols or for solid fuels for hybrid concepts.

Subject Categories:

  • Organic Chemistry
  • Fuels
  • Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE