Synthesis of a Thiophene-Containing Bisbenzil and a Derived Polyquinoxaline.

摘要

The development of polyphenylquinoxaline (PPQ) polymers as high-temperature-resistant materials has been hindered, in part, by the high cost of one resin component, 1,4-bis (phenylglyoxaloyl) benzene (PGB). A low-cost synthesis of PGB or PGB-type compounds to be substituted for PGB in the synthesis of PPQ-type polymers is therefore desirable. This report deals with the synthesis of 1,4-bis (2-thienylglyoxaloyl)-benzene (THGB) by the benzoin condensation route in the search for a low-cost replacement for PGB, and its reaction with 3,3 -diaminobenzidine (DAB) to prepare poly(2-thienyl)quinoxaline (PTHQ). Some of the properties of the polymer have been determined and are discussed. (Author)