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Title:The Fracture Behavior and Mechanical Performance of Biodegradable Cornstarch Plastic Composites
Author(s):Domingo, Bernadette Joy
Doctoral Committee Chair(s):Scott A. Morris
Department / Program:Food Science and Human Nutrition
Discipline:Food Science and Human Nutrition
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):Plastics Technology
Abstract:The principle of filler addition as a means of preventing crack initiation and propagation was demonstrated by the addition of cellulose and soy protein isolate (SPI) to a common cornstarch matrix. The effects of cellulose and SPI fillers as anti-crack agents in high-amylose starch plastics were not obvious, but the tensile strength and elastic modulus of the high-amylose cornstarch/cellulose composite were 8106 psi and 201 ksi, respectively, which are greater than those of polypropylene. Comparison of the materials' tensile strength, strain and total energy-to-break to the roughness of the fracture surfaces obtained by three-dimensional reconstruction revealed a relatively positive correlation, meaning that as the fracture surfaces appear rougher and more characteristically like ductile fractures, the stronger, more ductile and tougher the materials.
Issue Date:1999
Type:Text
Language:English
Description:135 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1999.
URI:http://hdl.handle.net/2142/83741
Other Identifier(s):(MiAaPQ)AAI9953192
Date Available in IDEALS:2015-09-25
Date Deposited:1999


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