THE DEVELOPMENT AND EVALUATION OF A HYDROCARBON BINDER FOR HIGH ENERGY SOLID PROPELLANTS.
Abstract
Studies were made of saturated, partially saturated, and unsaturated hydroxy-terminated polybutadiene (HTPB) prepolymers as propellant binder ingredients. Highly loaded, isocyanate-cured propellants based on the partially saturated (up to 69%) and unsaturated propolymers of 3000-4000 MW and the LHT-240 crosslinker exhibited markedly better low temperature (-75F) properties than those prepared with the saturated HTPB prepolymers or a control based on a carboxy-terminated polybutadiene prepolymer. On 180F storage, oxidative surface hardening of propellants was decreased with increased saturation of the prepolymer, but with selected stabilizers isocyanate-cured binders made with HTPB prepolymers of all degrees of saturation became equally resistant to oxidation (12 days/180F); and the use of such stabilizers made marked improvement in the 350 degrees F aging of HTPB propellants. A study made of the stoichiometry of a model alcohol-isocyanate reaction in the presence of an advanced oxidizer indicated a promising approach to establishing acceptance standards for the oxidizer and predicting the effect of lot-to-lot variations in oxidizer on the cure of propellants. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1968
- Accession Number
- AD0834909
Entities
People
- Anthony J. Di Milo
- Edward J. Mastrolia
- Rodney H. Quacchia
Organizations
- Aerojet Rocketdyne Holdings