at small amount loading. Poly(butyl-ene adipate-co-terephthalate) (PBAT) is a biodegradable aliphatic–aromatic copolyester and a
commercial product with the trademark Ecoflex from BASF. In view
of its high toughness and biodegradability, PBAT is a promising candidate for toughening of PLA. Zhang et al.reported that the elongation of the PLA/PBAT blend was tremendously increased even at
5% PBAT loading level and continuously increased with increasing
PBAT content. Although the PLA and PBAT molecules are miscible
at 2.5 wt.% PBAT and below, phase-separation occurred in the case
of 5 wt.% PBAT and above [9]. Therefore, the incompatibility
between PLA and PBAT especially at interfaces is still an unfavorable
factor to prepare blends with satisfying properties. For these reasons, many works have been focused on the improvement of the
compatibility between PLA and PBAT. Ren et al.[10] performed
grafting Maleic anhydride (MAH) onto PLA and PBAT by reactive
extrusion, and good compatibility and functional properties of the
PLA/PBAT composite foams are achieved. Better miscibility were
also obtained by melt-blending of PLA and PBAT using glycidyl
methacrylate as a reactive compatibilizer