Polymer compound, composition, and molded product

A polymer compound comprising:

• a repeating unit including, in the following order,
• a rigid part consisting of a combination of an aromatic part having a 6-membered ring and an aromatic part having a 5-membered ring,
• a linker part selected from Group 1,
• a flexible part consisting of an alkylene group having 2 or more carbon atoms, and
• a linker part selected from Group 1,
• wherein the aromatic part having a 6-membered ring is a 1,3-phenylene group or a 1,4-phenylene group,
• the aromatic part having a 5-membered ring is a 1,2,4-oxadiazole-3,5-diyl group,
• Group 1:
• a single bond or a divalent linking group selected from the group consisting of —O—, —S—, —CO—, —SO2—, —NR—, —CH═CH—, and a combination of these groups, where R represents a hydrogen atom or an alkyl group,
• provided that the rigid part has a structure which consists of two or more of aromatic parts having a 6-membered ring and one or more of aromatic parts having a 5-membered ring, where the two or more aromatic parts having a 6-membered ring are apart from each other, and
• in the flexible part, one or more of —CH2-'s constituting the alkylene group other than a terminal may be substituted with —O—, —S—, —CO—, —SO2—, —NR—, —CH═CH—, or where R represents a hydrogen atom or an alkyl group.