High Temperature Laminating Resins.
Abstract
Three resin systems based on the addition reaction of the nitrile oxide group with nitrile and acetylene groups were investigated as to their suitability for impregnating fabric reinforcements and subsequently molding composite structures using little applied pressure. These resins were nitrile-terminated polyimides, acetylene terminated polyimides and nitrile substituted phenylene oxide oligomers. Procedures for their preparation are presented as well as the method of A-staging with terephthalonitrile N,N'-dioxide to yield resins suitable for the fabrication of glass cloth reinforced laminates using little applied pressure or vacuum bag molding techniques. Laminates prepared from these resins are stable in air up to at least 500 F with fairly good retention of thermal mechanical properties. These resins were amenable to vacuum bag molding techniques using molding temperatures in the range of 475-550 F and molding pressure of 14.7 psi. Thermal mechanical properties were measured for these laminates and are presented. (Author-PL)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1972
- Accession Number
- AD0909526
Entities
People
- Abraham L. Landis
- Robert H. Boschan
Organizations
- Hughes Aircraft Company