Polyphenylquinoxalines containing alkylenedioxy groups
AssigneeThe United States of America as represented by the United States National Aeronautics and Space Administration
InventorsPaul M. Hergenrother, Stephen J. Havens, Frank W. Harris
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Abstract
New polyphenylquinoxalines have been prepared from the reaction of novel bis(.alpha.-diketones) with aromatic bis(o-diamines). These polyphenylquinoxalines have lower glass transition temperatures and melt viscosities and consequently better processability than known polyphenylquinoxalines. The properties of these new polyphenylquinoxalines (tensile strength, modulus, elongation, adhesive strength, fracture energy, and solvent resistance) are comparable with the properties of known polyphenylquinoxalines.
Claims1
A polyphenylquinoxaline having the general structural formula:
- ##STR11## (a) wherein n is an integer between 4 and 100;
- (b) wherein R is a radical selected from the group consisting of:
- ##STR12## and (c) wherein Ar is a radical selected from the group consisting of:
- ##STR13## wherein X is a bond or X is a linking group selected from the group consisting of:
- ##STR14##
Dependencies are inferred from the claim text.