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

Hassell, David (2008-08-27)


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).