Polystyrene PS648 outlet optical birefringence pattern, piston speed 1.0mm/s


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Authors
Hassell, David 
Abstract

The optical birefringence pattern obtained from polystyrene PS648 flowing through a narrow slit. Experiment conducted on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 1.0 mm/s at 170C. Video shows the outlet flow (from top to bottom).

Description

Conditions: Material=DOW polystyrene PS648, Mw~333kg/mol, polydispersity~2.0, Temperature=170 degrees celsius, Piston speed=1.00mm/s, slit width=0.6mm, slit length=8mm, slit depth=10mm

Keywords
rheology, polystyrene, birefringence, multi-pass rheometer
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Sponsorship
EPSRC, funded through the second Microscale Polymer Processing consortium.