In this study, we address the effect of blending on self-adhesion and bio-degradation of poly (lactic acid) (PLA) and its blends with Poly(butylene adipate-co-terephthalate) (PBAT). PLA was blended with PBAT and film samples were prepared from both pure resins and their blends using film casting technique. Film surfaces were put in intimate contact for 1s and in the temperature range of 70°"C" to 140°"C" to measure the adhesion properties. To distinguish the effect of crystallization, both amorphous and crystalline PBAT films were tested and compared to their blends with PLA. The thermal analysis shows a significant effect of crystalline structure of PBAT on shifting its self-adhesion initiation temperature Tsi up to 20"°C" . Incorporation of PBAT as a dispersed phase also shifts Tsi of blends samples. The gradual decrease in PBAT crystallinity in the blends caused by the hindering effect of PLA rigid molecules correlates with the shift in their self-adhesion initiation temperature. The SEM micrographs show a morphology of elongated ovals developed through elongational flow during the cast film process. This morphology increases the aspect ratio of the dispersed phase and enhances the adhesion process. The blends films also showed higher toughness and better puncture resistance as a result of blending. In terms of biodegradation, ATR-Fourier Transform infrared technique was used in combination with lab scale composting setup to investigate the selective composting of PLA/PBAT blends having 50% PLA and referred to as PLPT5. The results from gas collection revealed a decrease in the rate of CO2 evolution as a consequence of blending. The absorption ratio of C=O bond for PLA decreased gradually as a function of composting time leading to a decreased ratio of PLA/PBAT ester bond absorption in the blends. SEM micrographs showed the formation of a porous three 3D network rich in PBAT for the blend after 15 days. Blends revealed a gradual loss of modulus with time.