Investigation of Resin Systems for Improved Ablative Materials
Abstract
This interim report describes the work performed under Contract NAS3-7949 to advance the state-of-the-art of resin matrices required for improved ablative materials for use with high energy fluorine-containing liquid propellant systems during the period 10 January through 1 July 1966. This is being accomplished through experimental studies on consecutive material development tasks initiated during this period involving synthesis and property determinations, resin formulation optimization and composite processing parameter studies. In future work these tasks will be continued and the objective will be attained through synthesis scale-up and fabrication of ablative composites tasks. This program is an extension of initial studies conducted under Contract NAS3-4188. Synthesis and property determinations have been directed to preparation and evaluation of new modified polyimide resins based on new anhydride monomers, bis(5-tetrahydrophthalic anhydride) sulfone and bis(p-3, 4-dicarboxy anhydride phenoxy phenyl) sulione, which offer improved processability. Optimization of resin systems, identified in Contract NAS3-4188 as advanced resin materials is being carried out to improve physical, chemical and processing characteristics. Composite processing studies have been conducted to determine the parameters which affect the fabrication of graphite and silica reinforced polyamide-imide and modified polyimide resins. Preliminary testing of the resistance of neat resins and composites containing state-of-the-art and advanced resins in fluorine/hydrogen and FLOX/methane combustion environments shows that (1) 'stiff' polymers appear to be superior to other types of organic resins, and (2) different reinforcement are preferred in each propellant combination combustion environment- - graphite in fluorine/hydrogen and silica in FLOX/methane.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 25, 1966
- Accession Number
- ADA307899
Entities
People
- E. A. Burns
- H. R. Lubowitz
- J. F. Jones
- R. C. Nordberg
Organizations
- TRW Inc.