Melting Point and Viscosity Behavior of High Energy Density Missile Fuels
Abstract
Three isomers of perhydrodi-(norbornadiene) (PHDNBD or RJ-5), the main component of the RJ-r and RJ-6 missile fuels, have been purified by recrystallizing the synthetic isomeric blends from acetone at dry ice temperature. The isomers have been designated HNN, HXX, and isomer I. HNN and HXX could be purified to 99.9% in three recrystallizations, out only 97% was reached with isomer I after thirteen recrystallizations. Melting points were measured by ASTM method D2386-67 as a function of composition for mixtures of the three RJ-5 isomers with themselves and with exotetrahydrodi(cyclopentadiene) (XTHDCPD or JP-10). HNN and HXX each have two crystalline forms. The solid-solid transitions between these two forms are sluggish, so that depending on thermal history or the type of crystal used to seed the melt, either form might crystallize and remelt on heating. Hence, most melts containing HNN and HXX as the main component could exhibit either of two melting points. Enthalpies of fusion and solid and liquid heat capacities were measured by DSC for HNN and HXX. Shear viscosities and densities were measured as a function of temperature (-55 to 50C) and composition for mixtures of HNN, HXX and isomer I with XTHDCPD. There was very little difference among athe viscosity-composition isotherms for the three RJ-5 isomers.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1982
- Accession Number
- ADA121799
Entities
People
- C. T. Moynihan
- E. N. Boulos
- M. Adel-hadadi
- M. Shahriari
- R. Mossadegh
Organizations
- The Catholic University of America