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Sreekumar P.A.,University of Rouen | Sreekumar P.A.,Laboratoire Of Genie Des Materiaux Materiaux Lgma | Leblanc N.,Laboratoire Of Genie Des Materiaux Materiaux Lgma | Saiter J.M.,University of Rouen
Journal of Polymers and the Environment

This paper reports the effect of glycerol on thermal, mechanical and morphology of the wheat-flour based thermoplastic sheets (<3 mm) fabricated using single screw extrusion followed by compression molding. The amount of glycerol (plasticizer) added during the formulation varies from 20 to 35 % w/w (20, 23, 25, 30 and 35 % w/w). Results indicate that increase in the amount of glycerol in the starch based thermoplastic sheets, lowers its hardness and tensile properties while an increase in the melt flow index. Variation in the glycerol content from 20 to 25 % w/w increases the impact strength of the thermoplastic sheets beyond this limit it decreases. The contact angle analysis shows that glycerol has effect on the surface energy and work of adhesion of the thermoplastic sheets. However, the presence of glycerol has no significant influence on the thermal stability of thermoplastic sheets above 200 °C. © 2012 Springer Science+Business Media, LLC. Source

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