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Measurements were taken of flow birefringence of viscoelastic polymeric melts in the upstream reservoir and in the entrance region. Materials investigated were polypropylene, high-density… (More)
An experimental and theoretical study has been carried out, as a continuation of our previous investigation, to better understand the problems associated with converging flows of viscoelastic… (More)
An experimental study has been carried out to measure velocities of viscoelastic polymeric melts flowing into a sharp-edged slit die and in the fully developed region of the slit die. For the… (More)
SummaryTransient experiments with polymer melts were carried out using the flow birefringence technique. In the transient experiment, motion pictures were taken of isochromatic fringe patterns of… (More)
An experimental study has been carried out to investigate effects of stretch ratio on molecular orientation in polypropylene monofilaments which are melt spun from a ribbon die into a water bath with… (More)