SOLID PROPELLANT MECHANICAL PROPERTIES INVESTIGATIONS.
Abstract
Dilatometric studies were made on the mechanical response of a polyurethane and a carboxyterminated polybutadiene composition by extension at constant strain rates and constant loads. Increasing strain rate appeared to cause initiation of dewetting at lower strains, greater extent of dewetting at fixed values of strain, and higher ultimate degree of dewetting prior to rupture. Temperature influenced dilatation in much the same way as strain rate; lower temperatures acted the same as higher rates. Though volume-time relationship for tests at constant strain rate and constant load differed considerably, volume-strain curve shapes were similar. Mechanisms of propellant dilatation were postulated on the basis of three regions of behavior. The first region was exemplified by the linear viscoelasticity of filled rubber; the second region was considered to consist of dewetting, with binder-particle bond rupture and retardation due to frictional forces at the binder-particle interface having the greatest influence on response. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 06, 1963
- Accession Number
- AD0426094
Entities
People
- James A. Rinde
- Norman Fishman
Organizations
- SRI International