分别以乙二醇、甘油、聚乙二醇400和甲酰胺为增塑剂对淀粉/聚乳酸复合材料进行增塑处理，研究增塑剂种类对淀粉/聚乳酸复合材料性能的影响.采用XRD、SEM、TGA以及旋转流变仪对复合材料的相容性进行了表征，并测试了复合材料的熔融指数、力学性能和吸水率.结果表明，增塑剂对淀粉/聚乳酸复合材料的相容性改善效果依次为甘油＞甲酰胺＞乙二醇＞聚乙二醇400.淀粉/聚乳酸复合材料的力学性能和吸水率受相容性影响，呈现相容性越好，力学强度越大，断裂伸长率越大，吸水率越低的趋势.醇类增塑剂增塑复合材料的熔融流动性随着分子链增长逐渐变差，而甲酰胺增塑复合材料的熔融流动性过大.
Starch/polylactic acid (PLA)composites were plasticized with ethylene glycol,glycerol,polyethylene glycol 400 and formamide as plasticizer,respectively.The effect of plasticizer types on the properties of starch/PLA composites was studied.The compatibility of the composites was characterized by XRD,SEM,TGA and rotary rheometer.The melt index,mechanical properties and water absorption rate of composites were also tested.The results show that,the compatibility improve effectiveness of starch/PLA composites with different plasticizers was follow the glycerol > formamide > ethylene glycol > polyethylene glycol 400.The mechanical properties and water absorption rate of starch/PLA composites were affected by the compatibility.The better compatibility,the greater mechanical strength and elongation at break,but the lower water absorption rate. The melt fluidity of alcohols plasticizer plasticized composites was gradually decreased along with the increasing of molecular chain,but melt fluidity of formamide plasticized composites was too large.
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