Abstract
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 language | English |
|---|---|
| Title of host publication | PPS07 EA : PPS07 EA |
| Number of pages | 7 |
| Volume | 1 |
| Place of Publication | Copenhagen, Denmark |
| Publisher | Hexagon Holding ApS |
| Publication date | 2007 |
| Edition | 1 |
| Pages | 1-7 |
| Publication status | Published - 2007 |
| Event | Europe/Africa Regional Meeting Polymer Processing Society - Gothenburg, Sweden Duration: 28 Aug 2007 → 30 Aug 2007 |
Conference
| Conference | Europe/Africa Regional Meeting Polymer Processing Society |
|---|---|
| Country/Territory | Sweden |
| City | Gothenburg |
| Period | 28/08/2007 → 30/08/2007 |