Thermoplastic starch was produced by thermal extrusion using
a co-rotating twin screw extruder Prism (Eurolab, England), Fig. 1.
Extensive experimentation was conducted before the desired
operating conditions were established. The extruder barrel temperature
profile was 35/70/100/130/130/120/110/80/80/90 C from
the feeder to the die end. This temperature profile readily volatilizes
the alcohol used in the process.