Abstract
The production rate of polymer fibers by extrusion is usually limited by the appearance of a series of instabilities ("melt fracture") that lead to unwanted undulations of the surface. We present both qualitative and quantitative experimental evidence that-in addition to previously known polymer-specific scenarios-there is an intrinsic route towards melt fracture type phenomena: a nonlinear ("subcritical") instability of viscoelastic Poiseuille flow.
Original language | English |
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Article number | 114502 |
Pages (from-to) | - |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 90 |
Issue number | 11 |
DOIs | |
Publication status | Published - 21 Mar 2003 |