the manufacture of polyetherquinoxalines may be accomplished by polymerization of quinoxaline and related monomers with a bisphenol under aromatic nucleophilic substitution reaction conditions . a method of manufacture includes contacting a substituted or unsubstituted quinoxaline having replaceable groups at the 2 , 3 positions with a bisphenol or a bisphenol derivative under aromatic nucleophilic substitution reaction conditions . the resulting polyetherquinoxalines contain quinoxaline groups joined by ether linkages at the 2 and 3 positions of the quinoxaline groups . in one example , the polyetherquinoxaline has a formula represented as wherein “ n ” is an integer from 1 to 10000 , and r 1 , r 2 , r 3 , r 4 are independently hydrogen , methyl , cf 3 , tert - butyl , benzoyl , benzenesulfonyl , a sulfonic acid salt , an aliphatic group , an alicyclic group , or an aryl group , and ar is an aromatic radical . these melt - processable polyetherquinoxalines can be prepared under relatively mild conditions , have excellent thermal and mechanical properties , and are organo - soluble , transparent and colorless thermoplastics .