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United States Department of Agriculture

Agricultural Research Service

Title: Mechanical and Thermal Properties of Starch-Filled Poly(d,l-Lactic Acid)/ Poly(hydroxy Ester Ether) Biodegradable Blends

item Garlotta, Donald
item Doane, William - 3620-45-00(RETIRED)
item Shogren, Randal
item Lawton Jr, John

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: June 7, 2000
Publication Date: N/A

Technical Abstract: This research focused on the mechanical, structural and thermal properties of injection molded composites of granular cornstarch, poly(D,L-lactic acid) (PDLLA) and poly(hydroxyester-ethers) (PHEE). These composites were compounded on a twin screw extruder prior to injection molding. They had high tensile strengths (40-50 MPa) at starch loadings up to 70% by weight. SEM micrographs of fractured specimens revealed good adhesion of starch to the polymer matrix, as evidenced by broken starch granules. The crystallinity of the poly(D,L-lactic acid) in the blends was studied using differential scanning calorimetry and wide-angle X-ray diffraction. Data on the effects of starch and PHEE on PDLLA crystallization will also be presented.

Last Modified: 4/22/2015
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