title: Deformation mechanisms of plasticized starch materials.
abstract: The aim of this paper is to understand the influence of plasticizer and plasticizer amount on the mechanical and deformation behaviors of plasticized starch. Glycerol, sorbitol and mannitol have been used as plasticizers. After extrusion of the various samples, dynamic mechanical analyses and video-controlled tensile tests have been performed. It was found that the nature of plasticizer, its amount as well as the aging of the material has an impact on the involved deformation mechanism. The variations of volume deformation could be explained by an antiplasticization effect (low plasticizer amount), a phase-separation phenomenon (excess of plasticizer) and/or by the retrogradation of starch.
authors.affiliation: Université de Reims, I.N.R.A., U.M.R. F.A.R.E., 51686 Reims Cedex, France.
authors.forename: P-Y
authors.initials: PY
authors.lastname: Mikus
authors.affiliation: Department of Polymers and Composites Technology & Mechanical Engineering, Ecole des Mines de Douai, 59508 Douai Cedex, France.
authors.forename: S
authors.initials: S
authors.lastname: Alix
authors.affiliation: Department of Polymers and Composites Technology & Mechanical Engineering, Ecole des Mines de Douai, 59508 Douai Cedex, France. Electronic address: jeremie.soulestin@mines-douai.fr.
authors.forename: J
authors.initials: J
authors.lastname: Soulestin
authors.affiliation: Department of Polymers and Composites Technology & Mechanical Engineering, Ecole des Mines de Douai, 59508 Douai Cedex, France.
authors.forename: M F
authors.initials: MF
authors.lastname: Lacrampe
authors.affiliation: Department of Polymers and Composites Technology & Mechanical Engineering, Ecole des Mines de Douai, 59508 Douai Cedex, France.
authors.forename: P
authors.initials: P
authors.lastname: Krawczak
authors.affiliation: Institut de Chimie Moléculaire de Reims, Université de Reims Champagne Ardenne, UMR CNRS 7312, 51686 Reims Cedex, France.
authors.forename: X
authors.initials: X
authors.lastname: Coqueret
authors.affiliation: Université de Reims, I.N.R.A., U.M.R. F.A.R.E., 51686 Reims Cedex, France.
authors.forename: P
authors.initials: P
authors.lastname: Dole
keywords: Mechanical behavior; Plastic deformation; Plasticized starch; Volumetric deformation