Accession Number : ADD008152

Title :   Polyaromatic Ether-Keto-Sulfones and Their Synthesis.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Marvel,Carl S ; Frentzel,Richard L

Report Date : 24 Feb 1981

Pagination or Media Count : 7

Abstract : Polymers having pendant phenylethynyl groups are obtained by reacting phenylacetylene with a bromine-containing polymer prepared by reacting bis-p-phenoxy-4-4'-(2-2'-dibromodiphenyl)ketone or 2-2'-dibromodiphenyl-4-4'-dicarbonyldichloride with isophthaloyl dichloride and 4-4'-bis-p-phenoxydiphenylsulfone. Because the polymers cure without the evolution of volatiles and have softening points higher than their cure temperatures, they are especially suitable for use in fabricating fiber-reinforced composites. (Author)

Descriptors :   *Patents, *Fiber reinforced composites, *Phenyl radicals, *Acetylenes, *Synthesis(Chemistry), Curie temperature, Transition temperature, Phase transformations, Softening points, Polymers, Aromatic compounds, Sulfones, Ketones, Ethers

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE