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《Anhui Chemical Industry》 2010-03
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Preparation and Properties of Poly(L-lactic acid)/Starch Composites by Microwave Melt-blending Method

WANG Wei1,JIANG Su-wei2,PANG Min2,HUANG Jun1,WANG Hua-lin1(1.School of Chemical Technology,Hefei University of Technology,Hefei 230009,China;2.School of Biotechnology and Food Engineering,Hefei University of Technology,Hefei 230009,China)  
Poly(L-lactic Acid)(PLLA)/starch composites were prepared by microwave melt-blending method from Llactic acid(LLA)and starch.The structure of composites was characterized by Fourier Transform Infrared Spectroscopy(FT-IR),X-ray diffraction(XRD)and Field scanning electron microscope(SEM),and the properties were tested.Maleic anhydride and glycerin work as chemical bridge between LLA and starch in PLLA/starch composite,resulting in the improving of compatibility,but the α orthonormal structure for PLLA is distorted.Water absorption of the composite is increasing with the increase of starch.Moreover,water absorption of the composite is decreasing at first,and then increasing with the increase of glycerin.When glycerin content is 0.6%,water absorption reaches the minus value.The biodegradation of PLLA/starch composite by α-amylase include three stages:the degradation rate is smaller at first stage,increasing at medium stage and decreasing at late stage.
【CateGory Index】: TB332
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【Citations】
Chinese Journal Full-text Database 4 Hits
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1 Fang Xianli1, Gu Dongya2, Wang Yong3, Chen Xianyi1(1. College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China;2. Department of Chemical Engineering,Yancheng Textile Vocational Technology College, Yancheng 224005, China;3. College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China );PROGRESS IN COMPATIBILIZATION OF STARCH FILLED POLY(LACTIC-ACID) SYSTEM[J];Engineering Plastics Application;2007-03
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