Effect of processing conditions on intrinsic viscosity of extruded cornstarch

Autor: R. L. Cunningham
Rok vydání: 1996
Předmět:
Zdroj: Journal of Applied Polymer Science. 60:181-186
ISSN: 1097-4628
0021-8995
Popis: Unmodified cornstarch from dent corn was used in this study to determine the effect of twin-screw extrusion conditions on the intrinsic viscosity of this polysaccharide and water. The study focused on the intrinsic viscosity of the cornstarch as a function of the key variables. Primary variables examined were temperature (75, 100, and 125°C), starch concentration or consistency (35, 50, and 65%), and screw speed (100, 200, and 300 rpm) during the extrusion processing. The most favorable conditions examined were the extrusion of the cornstarch at 35% consistency, 100°C, and 200 rpm. Two-thirds of the original intrinsic viscosity of the unmodified starch was retained upon extrusion at 35% consistency at all temperatures and the screw speeds (200 and 300 rpm) examined. Also, similar values were observed at 50% consistency for 75°C at 100 and 200 rpm and for 100°C at all three screw speeds. © 1996 John Wiley & Sons, Inc.
Databáze: OpenAIRE
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