Epoxidized sunflower oil (ESO) was utilized as a plasticizer for polylactic acid (PLA) using chloroform as a solvent by a solution casting process at various ratios of PLA to ESO. Fourier-transform infrared (FTIR) spectroscopy was used to identify the functional groups of PLA, ESO, and PLA/ESO blends. Thermal stability and mechanical and morphological properties of the blends were investigated by thermogravimetric analysis, tensile property measurements, and scanning electron microscopy technique, respectively. The FTIR spectra indicate that there are some molecular interactions by intermolecular hydrogen bonding between PLA and ESO. PLA/ESO blends show high thermal stability and significant improvement of mechanical properties compared with pure PLA. The highest elongation at break was obtained when the ratio of the PLA/ESO blend was 80/20. Morphological results of PLA/ESO blends show that ESO was well miscible with PLA.
Research on Chemical Intermediates – Springer Journals
Published: Dec 25, 2012
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