DEVELOPMENT OF FLEXIBLE POLYMERS AS THERMAL INSULATION IN SOLID-PROPELLANT ROCKET MOTORS
Abstract
The mechanical properties of several unfilled and asbestos-filled resins were determined. The elongations of three unfilled epoxy resins varied from 160 to 510% while the elongations of three abestos-filled epoxy resins varied from 1.9 to 6.3%. An asbestos-filled polyurethane resin had an elongation of 17%. Except for the filled epoxy resin with an elongation of 1. 9%, these materials have adequate ductility for service requirements. Six motor firings were made this report period in which several asbestos-filled epoxy and polyurethane resins were evaluated. The best performing material was the Epon 828-te trahydrophthalic anhydride-castor oil formulation filled with 40% of long-fiber asbestos. The char rate of this material in several motor firings, varied from 1.5 to 2.7 mil/sec (average of six samples was 2.0). The 40%-castor oil-modified Guardian filled with 40% long fiber asbestos has also continued to perform well. The best performing polyurethane resin gave char rates of 2.5 and 2.3 mil/sec in two different motor firings. All three of these materials show better insulation performance than the best commercially available materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1963
- Accession Number
- AD0403799
Entities
People
- E. B. Simmons
- R. O. Thomas
- T. R. Walton
Organizations
- ARCO