| http://www.w3.org/ns/prov#value | - One type is a wholly aromatic polymer containing a recurring benzimidazole, benzthiazole or benzoxazole structure, such as poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole, poly benzol(1,2-d:4,5-d') bisthiazole-2,6-diyl!-1,4-phenylene, poly benzol(1,2-d:4,5-d')bisoxazole-2,6-diyl!-1,4-phenylene), and the like, as disclosed in U.S. Pat. Nos. 4,423,202; 4,225,700; 4,463,167; 4,487,735; and 4,579,915.
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