Submitted to: Annual Meeting of the Bio Environmentally Degradable Polymer Society
Publication Type: Abstract Only
Publication Acceptance Date: December 12, 2000
Publication Date: N/A
Technical Abstract: This research focuses on the flow behavior of starch-filled polyester bio- degradable composites. The effects of starch content and granule size on composite relative viscosity are presented. Corn and potato starches were extruded with polyesters using a twin screw extruder with starch volume fraction from 0.27 to 0.66. Steady and dynamic rheology measurements were made at temperatures of 100 to 160EC, frequencies of 0.01 to 100 rad/s and ns of 0.01 to 100%. Experimental results show that Maron & Pierce, Thomas, and Frankel & Acrivos equation describe the relationship between the relative viscosity and the filler volume fraction. Small variations were seen with the different potato starch fractions. Viscosity differences in starch/polyester composites are more pronounced when different types of starches (rice, corn, wheat and potato) were used compared to different size fractions of the same starch (potato).