Suyanto, Dr. Ir. M.Si. and Handoko Darmoekoesoemo, Drs., M.Sc and Humaira, 080710031 (2013) Development of Bio-plastic Material Blending KonjacGlucomanan Flour and Chitosan Using Single Screw Extruder. Proceeding 4th International Conference & Workshop on Basic and Applied Sciences & 11th Regional Annual Fundamental Science Sumposium 2013..

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Abstract

The aim of the research is study physicochemical properties and the rheology of bio-plastic material. The method for blending polymer is processed using extrusion technology. Composition of material blending between konjacglucomannan(KGM) flour and chitosan are 50:10, 40:20, and 30:30 (% w/v), respectively with 20% glycerol and 0.315% tris-nonylphenylphospite (TNPP) as plasticizer and stabilizer. Physicochemical properties of bio-plastic materials were analysed by DSC, FTIR, SEM, and XRD. The results of the research showed that the bio-plastic material has melting point (Tm) in the range 100-118°C. Bio-plastic products included in the classification of elastomer based on the curve stress-strain relationship which leads to soft and tough character. The value of elongation at break is high, reaching 35%. The bio-plastic product showed that semi-crystalline structure with matrix pattern. Rheology of polymer including non Newton system based on the flow of the material from chitosan blending konjacglucomannan flour in the extrusion process which is showed a slow flow rate due to the high viscosity of the material.

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