Acetylene Terminated Quinoxalines ATQ.
Abstract
A series of acetylene terminated phenylquinoxaline oligomers have been prepared which cure by addition, without the evolution of volatiles. The synthesis utilized the novel terminal acetylene end-capping reagent, 3-(3,4-diaminophenoxy)phenyl acetylene. The end-capped oligomers were soluble (20-30%) in low boiling organic solvents and exhibited a high degree of flow at their softening temperatures. Thermal analytical data obtained on the oligomers indicated initial softening in the vicinity of 160 C and a strong polymerization exotherm maximizing at 274 C. Cured samples (8 hrs at 280 C) exhibited Tg's of approximately 320 C. Mass spectrometry-thermogravimetric analysis of the polymers demonstrated that no volatiles were emitted during cure, and that decomposition of the resins initiated at 465 C. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1976
- Accession Number
- ADA031003
Entities
People
- F. E. Arnold
- G. F. L. Ehlers
- R. F. Kovar
Organizations
- Air Force Research Laboratory