Tensile strength and Young’s modulus of blends decreased with increasing polyester content, but elongation at break showed the peak values at 15 wt% of polyester content. Elongation at break (Figure 3(c)) increased with the increasing polyester content as expected. Small amount of polyester significantly alters the elongation. This is consistent with the tensile strength results. Addition of polyester to the PLA systemresulted in a decrease in tensile strength and an increase in the elongation at break. The tensile strength of the blend did not significantly change with PBAT (PBS or PBA) content in the range from 5% to 15% but decreased rapidly when PBAT (PBS or PBA) content was decreased to less than 20%. An increase of the polyester content to 15% does not lead to a significant decrease of the tensile strength and tensile modulus of the PLA/PBS (PBAT) blends. A decrease by 30% was observed for the PLA/PBA
system. was increased to more than 25%. The elongation at break (Figure 3(c)) increased at higher polyester contents with the maximum value (>600%) occurring at a PBAT content of 15%. Interestingly, there is no dramatic decrease of tensile strength and modulus of the blends when polyester content