Dyeing behavior of polypropylene blend fiber. III. Effect of drawing on dyeability

A modified polypropylene fiber was prepared containing 6% of a basic polyme ric additive. The fiber was drawn to various ratios and its dyeability with an acid dye was tested. Structural changes due to the drawing were evaluat ed by application of eight different physical techniques: wide-angle X-ray diffraction, small-angle X-ray scattering, dark-field and optical microscop ies, scanning electron microscopy, and density, birefringence, and tensile testing. Variations in dyeability were attributed to density variations fro m macrovoids in the specimen. (C) 1999 John Wiley & Sons, Inc.