Preparation and Characterization of TPS-PBAT Composites
Na-GMMT/TPS pellets(TPS for short)were prepared with sodium montmorillonite as filler.TPS was blended with PBAT in different proportions,and TPS-PBAT composites were prepared by twin-screw extruder.The structure and properties of TPS-PBAT composites were characterized by universal material testing machine,X-ray diffraction(XRD),thermogravimetric analyzer(TG)and scanning electron microscope(SEM).The results show that when TPS is used as matrix,the tensile strength of the composites can be greatly improved while maintaining good elongation at break.The elongation at break of TPS-PBAT-4 composites is 233.3%and the tensile strength is 18.9 MPa.With the increase of TPS content,the diffraction peaks of the composites gradually flatten,indicating that the addition of TPS reduces the crystallinity of the composites.The addition of TPS improves the thermal stability of corn starch and PBAT.When PBAT is used as matrix,the compatibility between TPS and PBAT is poor.When TPS is used as matrix,there is no obvious boundary between TPS and PBAT,and it shows better compatibility.
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