| Abstract: | Polypropylene/ethylene vinyl acetate (PP/EVA) blends were prepared in a plastic extruder with a static mixer. The thermodynamic compatibility, morphology, crystal form, and rheological behavior of PP/EVA blends were investigated by SEM, DSC, and rheology instruments. The results showed that PP and EVA were thermodynamically incompatible, the viscosity of the PP/EVA blends decreased with increase of shear rate in a range of temperature, the PP/EVA blends had a sea‐islands structure, and the crystalline zones remained in their original state and could not form mixed crystals in the PP/EVA blends. The PP/EVA blends were melt spun to prepare matrix fibers and the spinning conditions such as EVA content, the matching factor between pump delivery and winding velocity, and the melt‐spinning temperature were also determined. The sorption process of a matrix fiber for essential oils, adsorbed under various sorption conditions such as sorption time, sorption temperature, and EVA content, was also studied. The results revealed that the composite isotherm of the adsorption of matrix fiber for essential oil was characteristic of a U model. Through adsorbing essential oil, the immersion‐type PP fragrant fibers could be prepared with the matrix fiber. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 1970–1979, 2003 |
