ARYLIDENE COPOLYETHER SULFONES .1. SYNTHESIS AND CHARACTERIZATION OF SOME NEW COPOLYETHER SULFONES CONTAINING DIBENZYLIDENE CYCLOPENTANONE MOIETIES

New copolyether sulfones containing 2,5-bis(4-oxo-benzylidene)-cyclope ntanone moieties were prepared in the conventional literature manner b y condensing the dipotassium salts of 2,5-bis(4-hydroxybenzylidene)cyc lopentanone (I) and 2,2-bis(4-hydroxyphenyl)propane (Bisphenol A, III) with 4,4'-dichlorodiphenyl sulfone (II), or by condensing the dipotas sium salts of I with chlorine-terminated Bisphenol A-4,4'-dichlorodiph enylsulfone copolymers (V). The resulting copolyether sulfones were co nfirmed by IR, viscometry, DSC measurements, thermooptical analysis (T OA), and thermogravimetric analysis (TGA).