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![](https://webarchive.library.unt.edu/eot2008/20090514143246im_/http://www.ars.usda.gov/incme/images/Research_head.gif) |
Research Project:
MODIFICATION OF NATURAL POLYMERS BY THERMO-MECHANICAL PROCESSING
Location: Plant Polymer Research
Title: Preparation of Starch Graft Copolymer by Reactive Extrusion
Authors
Submitted to: American Institute of Chemical Engineers
Publication Type:
Abstract
Publication Acceptance Date: November 21, 2003
Publication Date: November 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.
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.
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Last Modified: 05/13/2009
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