Isothermal Gas assisted displacement of a polystyrene melt

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Isothermal gas displacements of a polystyrene melt (shaped as circular cylinder with a radius of 2.5mm) placed inside a circular steel annulus were performed. A flow valve ensures a constant flow rate and rotational symmetric flow during the displacement. The experiments show an increase in the steady fractional coverage above a Newtonian level at very low Deborah numbers. At higher Deborah numbers, where the melt behaves as an entangled melt system, the steady fractional coverage decreases. The fractional coverage is the fraction of melt left in the cylinder during steady displacement. Numerical finite element simulations show quantitative agreement within experimental error for Deborah numbers 0.3 <De <1, based on Doi and Edwards strain model.
Original languageEnglish
Title of host publicationPPS07 EA : PPS07 EA
Number of pages7
Volume1
Place of PublicationCopenhagen, Denmark
PublisherHexagon Holding ApS
Publication date2007
Edition1
Pages1-7
Publication statusPublished - 2007
EventEurope/Africa Regional Meeting Polymer Processing Society - Gothenburg, Sweden
Duration: 28 Aug 200730 Aug 2007

Conference

ConferenceEurope/Africa Regional Meeting Polymer Processing Society
CountrySweden
CityGothenburg
Period28/08/200730/08/2007
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