Polyvinyl Alcohol Microspheres Reinforced Thermoplastic Starch Composites.We reported a new method to prepare polyvinyl alcohol (PVA)/thermoplastic starch (TPS) composites by using polyvinyl alcohol microspheres (PVAMS).  The PVAMS/TPS composites were characterized using tensile test, scanning electron microscopy (SEM), dynamic mechanical thermal analysis (DMTA) and thermogravimetric analysis (TGA).  Furthermore, the SEM and shift in the tan &delta; peak (T&alpha; and T&beta;) at the maximum value of 69.87 and &minus;36.52 &deg;C indicates that the PVAMS decreased the mobility of the amorphous starch molecules due to the strong intermolecular hydrogen bonds between PVAMS and TPS. 
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