Properties of epoxidized palm oil plasticized polytlactic acid |
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Authors: | Emad A Jaffar Al-Mulla Wan Md Zin Wan Yunus Nor Azowa Bt Ibrahim and Mohd Zaki Ab Rahman |
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Affiliation: | (1) Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia |
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Abstract: | In this study, epoxidized palm oil (EPO) was utilized as a plasticizer for polylactic acid (PLA) using chloroform as a solvent
by solution casting process at six weight ratios of PLA/EPO, 95/05, 90/10, 80/20, 70/30, 60/40, and 50/50, respectively. Fourier-transform
infrared (FTIR) spectroscopy was used to identify the functional groups of PLA, EPO, and PLA/EPO blends. Thermal stability,
mechanical, and morphological properties of the blends were investigated by thermogravimetric analyzer (TGA), tensile properties
measurements, and scanning electron microscope (SEM) technique, respectively. The FTIR spectra indicate that there are some
molecular interactions by intramolecular hydrogen bond between PLA and EPO. All sets of PLA/EPO blends show high thermal stability
and significant improvement of mechanical properties compare to pure PLA. The highest elongation at break (about 210%) was
obtained when the ratio of PLA/EPO blend was 80/20. Morphological results of PLA/EPO blends show that ESO was good miscible
with PLA. |
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