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Abstract
Biodegradable blends consisting of poly(lactic acid) (PLA), poly(butylene adipate-coterephthalate) (PBAT) and epoxidized natural rubber (ENR) were blended in two proportions at PLA/PBAT/ENR ratios of 70/10/20 and 70/20/10. Then, blends these biodegradable polymers (PLA/PBAT/ENR) with HDPE at various ratios of 20/80, 10/90 and 5/95 wt%, the mechanical and morphological properties were investigated. Tensile tests of PLA/PBAT/ENR blends revealed high tensile strength and modulus but low elongation compared with HDPE. The tensile strength, elongation at break and impact strength of HDPE/biodegradable polymer blends decreased with increasing biodegradable polymer contents. Morphological properties of HDPE/biodegradable polymer blends were investigated by scanning electron microscope, which showed smoother surface of HDPE/biodegradable (70/10/20) than those of (70/20/10) polymer blends according to ENR compatibilization effect.
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