期刊
CARBOHYDRATE POLYMERS
卷 114, 期 -, 页码 450-457出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.06.087
关键词
Plasticized starch; Mechanical behavior; Volumetric deformation; Plastic deformation
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. (C) 2014 Elsevier Ltd. All rights reserved.
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