The present invention provides a high-performance polyhydroxy fatty acid ester comprising a copolymer ester segment of polyhydroxy fatty acid ester segments and a first chain extender, wherein the first chain extender is selected from polyols. The preparation of high-performance polyhydroxyalkanoates according to the present invention comprises continuously reacting and extruding components including the polyhydroxyalkanoates and the first chain extender to obtain the high-performance polyhydroxyalkanoates. The present invention further melt mixes high-performance polyhydroxyalkanoates with composite polymers and other additives in a twin-screw extruder to prepare blended particles and blown film. The melt index of PHA modified by continuous reaction extrusion is significantly reduced, the molecular weight is increased, and the mechanical properties of the prepared modified PHA-PBAT film are improved.
Kerke Extrusion Equipment
