本論文主要研究生物可分解聚羥基丁酯(PHB)塑膠與水溶性澱粉聚摻合體的製備與性質測試。本研究製備之組成和比例如下：PHB/soluble starch =10/90、30/70、50/50、70/30、90/10，並添加了甘油及檸檬酸酯兩種不同的可塑劑。以TGA測定聚摻合體之熱裂解溫度(Td)、DSC觀察聚摻合物的玻璃轉移溫度與結晶度的變化、DMA測定之玻璃轉移溫度(Tg)及固態機械性質、並以SEM觀察聚摻合物相形態。 In this study, the preparation and properties of poly-3-hydroxybutyrate (PHB) blended with soluble starch are discussed. PHB is hard and brittle due to its high degree of crystallinity and high melting point. Therefore, it is desirable to blend PHB with other polymers to improve its toughness and processing window. The composition prepared in this research are as follows: PHB/soluble starch =10/90, 30/70, 50/50, 70/30, 90/10, and added with two kinds of plasticizer.Thermal degradation behavior was analyzed by thermal gravimetric analysis, the glass transition temperature Tg and the degree of crystallization of the blends were observed by differential scanning calorimetry. The dynamic mechanical properties of blends were analyzed and their morphology were characterized by the scanning electron microscopy.