Copolymers of poly(2 6-diphenyl-1 4-phenylene oxide)
Abstract
Abstract POLY(2,6-DIPHENYL-1,4,PHENYLENE OXIDE) IS CONVERTED TO A COPOLYMER BY METALATING THE META POSISTION OF SOME OF THE PHENYLENE RINGS WHICH, THROUGH A SERIES OF REACTIONS, LEADS TO INTRODUCTION OF A QUINOID SUBSTITUENT IN THE META POSITION OR TO RING CLOSURE WITH CONVERSION OF THE PHENYLENE UNIT TO A FLUORENE OR FLUORENONE UNIT. BECAUSE OF THE COMPLETELY AROMATIC NATURE OF THE COPOLYMER IT IS VERY OXIDATION RESISTANT. THE INTRODUCTION OF THESE NEW REPEATING UNITS ALONG THE CHAIN OF THE INITIAL POLYMER INTRODUCES AN IRREGULARITY SO THAT THE POLYCRYSTALLINE NATURE OF THE INITIAL POLYMER IS DESTROYED RESULTING IN A COPOLYMER WHICH IS READILY MOLDABLE WITHOUT NECESSITY FOR RAPID COOLING TO PREVENT EMBRITTLEMENT.
Inventors
- 👤 Johann F Klebe
Bibliographic Details
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