The effects of basic fiber-forming parameters on the porous structure, Moisture absorption, and strength properties of fibers from polyimidoamide nanocomposites were examined. Beneficial fiber-forming conditions were established in consideration of the fiber sorption and strength properties. It was found that the incorporation of montmorillonite into the fiber-forining polymer resulted in beneficial increases in fiber porosity and internal Surface area. (c) 2006 Wiley Periodicals, Inc.