Patent ID: 7893303

Claim:
A polyarylene comprising a structural unit according to formula (1): wherein: X and Y each independently represents a group selected from the group consisting of —CO—, —CONH—, —(CF 2 ) q — in which q is an integer of 1 to 10, —C(CF 3 ) 2 —, —COO—, —SO—, —SO 2 —, —O—, —S—, —CH═CH—, —C≡C—, and groups according to the following formulas or a single bond; Z represents an oxygen atom or a sulfur atom; R represents at least one atom or group selected from the group consisting of a hydrogen atom, a fluorine atom, an alkyl group, and a fluorine-substituted alkyl group; a is an integer of 1 to 20; n is an integer of 1 to 5; p is an integer of 0 to 10; and the polyarylene has a molecular weight of from 10,000 to 1,000,000 in terms of polystyrene-reduced weight average molecular weight determined by gel permeation chromatography.