In this article six new copoly(amide-imide)s (11a-c) were synthesized through the directpolycondensation reaction of 1,3-bis[4,4'-(trimellitimido) phenoxy] propane (6) with 3,3'-diamino diphenyl sulfone (7), 4,4'-diaminodiphenyl ether (8) and 1,5-naphtalene (9) in thepresence of fumaric acid (10) as a second diacid in a medium consisting of N-methyl-2-pyrrolidone, triphenyl phosphite, calcium c...

High performance polymers like PEEK (polyetheretherketone) and FRC (fiberreinforced composite) could substitute metallic alloys for removable partial dentures. However, these require aesthetic veneering. This study was to determine the bond strength direct composite. Specimens made of were produced air-abraded (50 μm aluminum-oxide). allocated four experimental groups: Luxatemp Glaze & Bond, Sc...