Synthesis of Polyimides Curable by Intramolecular Cycloaddition
Abstract
The concept of intramolecular cycloaddition (IMC) curing of polymers for use as matrix resins, previously established for polyphenylquinoxalines, has been extended to polyimides. Two novel aromatic diamines incorporating a 2,2'- bis (phenylethynyl) diphenyl moiety were synthesized and then polymerized with various bis-anhydrides. In the optimum combination, a polyimide was obtained which was soluble in aprotic solvents, softened at 185 deg. C, underwent a cure at 233 deg C wherein the 2,2'-bis(phenylethynyl) diphenyl moiety was converted to a much more rigid dibenzoanthracene structure, and the resultant polymer displayed a softening point of 310-325 deg C after cure.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1977
- Accession Number
- ADA041420
Entities
People
- Fred E. Arnold
- Frederick L. Hedberg
Organizations
- Air Force Research Laboratory