Polyaromatic ether‐ketone‐sulfones containing 1,3‐butadiene units

The acid chloride of 1,4‐bis‐ p ‐carboxyphenyl‐1,3‐butadiene (XI) and isophthaloyl chloride (XIV) were polymerized with 4,4′‐diphenoxy‐diphenyl sulfone (XII) and diphenyl ether (XIII) in a Friedel‐Crafts type of polymerization. The polymers obtained, which contained 5–20 mole % of butadiene units, were insoluble in all solvents. The polyamides prepared from the acid chloride of 1,4‐bis‐ p ‐carboxyphenyl‐1,3‐butadiene (XI) and aromatic diamines were also insoluble in all solvents.