Miscibility of Crystalline/Amorphous/Crystalline Biopolymer Blends from PLLA/PLLA/PHB with Additives

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.