A Study on Relation of Morphological, Structural and Rheological Properties on Dye Uptake of PP/PBT Melt Spun Polyblend Fibers with Blend Ratio Variation

In the present work, polypropylene/polybuthylene terephtalate melt spun polyblend fibers at various blend ratios were prepared and the relation of the morphological, rheological and structural properties to dye uptake were investigated. First PP and PBT granules at blend ratios of 5, 10, 20, 30, 40 percent of PBT dispersed phase were physically mixed then the melt spinning of blended samples were carried out by a Maddock mixing zone extruder. Suitable exhaust dyeing process without carrier was used for all melt spun PP/PBT polyblend fiber samples. Results shown the dye uptake of PP/PBT polyblend fiber samples significantly increased by increasing the PBT dispersed phase content. Increasing the PBT dispersed content leads to interface enhancement between matrix (PP) and dispersed phase (PBT) of polyblend fibers, decrease in the crystallinity percent and improves the adhesion bonds and active centers for dyes absorption of polyblend fibers. Positive deviation from linear mixing rule that observed in the melt viscosities are represented the morphological enhancement of polyblend fiber samples

Keywords:

PP/PBT polyblend fiber , melt spinning , morphological properties , rheological properties , structural properties