Submitted to: American Institute of Chemical Engineers
Publication Type: Abstract only
Publication Acceptance Date: 11/21/2003
Publication Date: 11/16/2003
Citation: Willett, J.L., Finkenstadt, V.L. 2003. Preparation of starch graft copolymer by reactive extrusion. American Institute of Chemical Engineers. p. 1. Interpretive Summary:
Technical Abstract: Graft copolymers of starch and polyacrylamide (PAAm) were prepared by reactive extrusion using a corotating twin screw extruder. Parameters investigated include screw speed, total feed rate, moisture content, temperature, and monomer content. In general, monomer conversions were 80% or greater with grafting efficiencies of 60% or more. PAAm molecular weights were several hundred thousand (g/mol), except in cases of high screw speed or high moisture content. Conversion, PAAm molecular weight, and grafting efficiency increased as the moisture content during extrusion decreased.