Dye Diffusion in Poly(ethylene Terephthalate) Fibers

Abstract
Temperature dependence of dye diffusion in poly(ethylene terephthalate) (PET) fibers heat set under slack and taut conditions at various temperatures (in the range 100-240°C) was investigated. The observed temperature dependence of diffusion coefficient was more appropriately represented by the Williams-Landel-Ferry approach rather than the Arrhenius equation. Values of the parameter Bd were determined.