MORPHOLOGY AND RHEOLOGY OF POLYCAPROLACTONE/THERMOPLASTIC STARCH BLENDS

摘要

Polycaprolactone (PCL)/thermoplastic starch (IPS) biodegradable blends were prepared via a one-step extrusion system over the entire range of composition at different viscosity ratios. A detailed morphology analysis of the PCL/TPS blends was investigated by electron microscopy after selective extraction. Through a judicious combination of concentration control and processing conditions, the volume average diameter of TPS droplets can be closely controlled from 0.5 to 16 μm. The rheological behavior of these blends is also examined in depth.