Abstract: Poly(lactic acid) (PLA)/poly(butylene adipate-co-terephthalate) (PBAT) blends were prepared by a melt-blending method, and the effect of tetrabutyl titanate (TBT), benzoyl peroxide (BPO) and acetyl tributyl citrate (ATBC) content on compatibility of PLA/PBAT blends at a weight ratio of 50/50 were investigated by mechanical measurements, differential scanning calorimetry and scanning electron microscopy. The results showed that the introduction of BPO and TBT improved the compatibility of PLA/PBAT blends. The tensile strength of the blends reached a maximum value of 39 and 40 MPa when 0.5 phr of BPO and ATBC was added, respectively. The presence of BPO and ATBC also improved the stiffness but showed no influence on impact toughness. However, the impact toughness can be improved by addition of TBT, and meanwhile, the elongation at break increased by 263 % at 0.5 phr TBT.

Key words: PBAT, PLA, compatibility