MODIFIED POLYACRYLONITRILE BLENDS WITH CELLULOSE-ACETATE - FIBERS PROPERTIES

Fiber forming polyacrylonitriles (PAN) were modified by copolymerizing acrylonitrile monomer with methyl acrylate (MA) and 2-acrylamido-2-me thyl propane sulfonic acid (AP), respectively, and blended with cellul ose acetate (CA). Fibers of MA-PAN, AP-PAN, and their blends with CA w ere wet-spun in dimethylformamide in a broad range of coagulation bath concentrations (CBC). The effects of hydrophilic and hydrophobic modi fication of PAN and the CBC, as well as the coagulation behavior, were studied in terms of morphology, mechanical properties, and water rega in property of the fibers. (C) 1997 John Wiley & Sons, Inc.