Thermally stable polymers showpromise in electrical uses
Chemical & Engineering News · 1968
Polyaromatic heterocycles are a new class of high-molecular-weight polymers with outstanding thermal stabilities and electrical properties, Japan's Dr. Naoya Yoda told the Fourth Biennial Polymer Symposium at the University of Massachusetts. The Toyo Rayon Co. chemist tells C&EN that thermally stable polymers based on amino-carboxylic acids and related compounds have commercial promise. Toyo Rayon is producing development quantities of new types of these high-temperature polymers for electrical uses. As a class, the plastics based on aromatic amino-carboxylic acids and related compounds have properties similar to Du Pont's polyimides. Interest in thermally stable polyaromatic heterocycles has generated a variety of new synthetic approaches to cyclopolycondensations. These condensations produce fully aromatic or pseudo-aromatic polymers, the Harvard- educated chemist and former postdoctoral coworker of Dr. Carl S. Marvel at the University of Arizona (who pioneered the field of high-temperature aromatic heterocyclic polymers) explained to the symposium, sponsored by the ACS Division of Polymer Chemistry. Tetrafunctional compounds containing diamino ...