Properties of Extruded Acetylated Starch Plastic Filled with Cellulose Acetate
2003
Chen, Y. | Ishikawa, Y. | Zhang, Z.Y. | Maekawa, T.
Acetylated starch and 15% cellulose acetate were pretreated with acetone solution, and the pretreated mixture was extruded as a composite. The tensile strength and water resistance were effectively improved due to addition of cellulose acetate as compared to the acetylated starch plastic. The composite had a uniform phase, based on observations using scanning electron microscopy, because the acetylated starch and cellulose acetate combined during pretreatment and later extrusion to form a uniform structure. In addition, the tensile and thermal properties of the composite depended on its equilibrium moisture content in relation to various relative humidity environments. The Halsey equation can be applied to describe the relationship between the equilibrium moisture content and various relative humidity conditions, and the Gordon-Taylor equation was found to predict the glass transition temperature of the composite in various equilibrium moisture content conditions.
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