Abstract
Miscibility of three biopolymers (PLLA, PDLLA and PHB) blends were investigated by POM, WAXD, FTIR, and DSC. DSC verified the thermal properties of biopolymer blend with PVAc as a compatibilizer, and TBC as plasticizer. Some change in glass transition temperature (T-g) of biopolymer blends from 60 degrees C to 0.7 degrees C. The spherulitic morphology of blend 9 changing by addition more PHB (50%), the results dendritic spherulites. The adding PHB to PLLA blends make certain shifting in the diffraction peak from 2 theta = 16.9 degrees to 2 theta = 16.6 degrees and the carbonyl group shifts from 1752 cm(-1) to 1732 cm(-1) in blends, demonstrating polar interactions between them.