Abstract
Poly (lactic acid) /Poly (butylene succinate) (PLA/PBSU) polymer blends were fabricated to improve the fracture and biodegradable properties. Heat treatments were conducted on the specimens to improve the reduction in stiffness due to blending. The effects of heat treatment on the mechanical and fracture properties were discussed with the results of dynamic mechanical tests and fracture toughness tests, respectively. Storage modulus increased with increasing PLA contents. Heat treatments also improved the modulus because of the crystallization. The critical energy release rate, Jcr and the fracture energy, Jf, however, decreased with heat treatment. Excessive contents of PLA or PBSU significantly decreased Jcr and Jf.
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