SOLID PROPELLANT MECHANICAL PROPERTIES INVESTIGATIONS
STANFORD RESEARCH INST MENLO PARK CA
Pagination or Media Count:
Carboxy-terminated polybutadiene and polyurethane compositions for use in this program were prepared sufficient quantities of bagged and unbagged end-bonded specimens are in desiccated storage. Instron quality-control test data for all batches of the polyurethane composition are tabulated although these data do not provide good evidence for batch-to-batch reproducibility, volumetric swelling ratios show little difference among batches of each composition. The dilatometer was completed and is undergoing final evaluation and calibration. Preliminary measurements of volume change during extension at constant strain rate demonstrate adequate sensitivity and effective operation. Tests of desiccated end-bonded specimens at several constant strain rates and temperatures using the Instron were completed ultimate property data on carboxyterminated polybutadiene composition AFBA-1 are not particularly consistent and do not yield a well-defined failure envelope, except in the case of batch NF2238. Some preliminary data are presented on constant load and constant loading rate tests.
- Solid Rocket Propellants