THESIS - ROC CH ... - FINAL - resubmission.pdf - University of Guelph

a
Figure 4.2: a) Schematic of extruder outlining 4 heating zones. b) The extruding scre w with
relative heating zones shown. Two recirculating units are highlighted. c) Close up view of second
recirculating unit.
The equilibrated formulation was compounded and formed into strands using the
extruder equipped with a strand die. Operating temperatures were set at 100 o C for all 4 zones of
the extruder. The screw speed was set at the maximum speed of 120 rpm. The yielded strands
were pelletized using a kitchen food processor (FP2500B, Black and Decker, Maryland, USA)
prior to extrusion processing. Extrusion of continuous SPI film was carried out with the same
extruder but using a 6‖ cast die. Operating temperatures were 120, 140, 150, and 140°C for
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b
c