Mechanical Property Characterization of Propellant Binders in Terms of Polymeric Parameters: The Butyl Acrylate/Hydroxypropyl Methacrylate System.
Abstract
A method of producing cured propellant binder gumstocks suitable for mechanical property studies from prepolymers which normally are processed in solvent or plasticizers is discussed. The system consisting of a copolymer of butyl acrylate and hydroxypropyl methacrylate crosslinked with hexamethylene diisocyanate served as a model propellant binder gumstock to study the influence on mechanical properties of backbone and crosslinking structures. The effects on the observed broad spectrum mechanical properties of these materials as the structures were systematically varied were experimentally studied. It was found that for this system the high temperatures and long-time mechanical properties were predominantly determined by the crosslink density, while the low temperature and high strain rate propellants were determined by backbone chemical structure. The mechanical property measurements were compared with the results obtained from equilibrium swelling measurements. Attempts were made to catalyze the isocyanate-hydroxyl reaction. Chemical factors relating to the urethane crosslinking process are discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1969
- Accession Number
- AD0854164
Entities
People
- Anthony R. Pitochelli