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《Polymer Materials Science & Engineering》 2009-12
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Rheological and Phase Transition Properties of Thermoplastic Starch Under the Plasticization of Glycerol

LI Dan,LIU Peng,PU Hua-yin,CHEN Ling,YU Long (School of Light Industry and Food Engineering,South China University of Technology,Guangzhou 510640,China)  
Rheological and phase transition properties are the important parameters for industrial production of thermoplastic starch(TPS).In this paper,Haake Rheometer and differential scanning calorimetry(DSC) were used to study TPS′s rheological and phase transition properties under the plasticization of glycerol.The results show that: the plasticization effect of glycerol is different from that of water.On one hand,the change of torque is caused by the phase transition of starch;On the other hand,it is caused by the material feeding of glycerol which can lubricate starch while goes against the plasticization of starch.Consequently,with the increase of glycerol,the plasticization degree of TPS decreases firstly,but increases later.What's more,the high roller speed can enhance shear force,so can intensify the plasticization degree of TPS.Similarly,the high temperature can also accelerate the plasticization of TPS,which is even more notably.
【Fund】: 国家高技术研究发展计划(863计划)2007AA10Z312资助
【CateGory Index】: O636.12
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