Poly(aryl ether ketones) bearing alkyl side chains

Poly(aryl ether ketones) containing pendant alkyl side chains were prepared by the nucleophilic displacement reaction of 2,2-bis (4-hydroxphenyl) trid ecane, 2-2,bis(4hydroxyphenyl)nonadecane and bisphenol AF with 2,2-bis-[4-( 4-fluorobenzoyl)phenyl]propane and 2,2-bis[4-(4-fluorobenzoyl)phenyl]hexafl uoropropane in the presence of potassium carbonate in N,N-dimethylacetamide . The polymers had inherent viscosities up to 1.04 dl g(-1) in chloroform, formed creaseable films and were soluble in common organic solvents. Their dielectric constants were below 2.60 (at 10 GHz). The inclusion of the alky l side chains lowered the T-g, thermal stability and char yield of fluorina ted poly(ether ketone) as expected.