Abstract: Abstract: The POE/PLA blends, prepared by the melting method, which were investigated on structure, melting and mechanical properties of blends by XRD and differential scanning calorimetry (DSC) and tensile testing machine in detail. The results from XRD showed that POE promote crystallization of PLA and induced a new crystal structure; as POE loading increased, the cold crystallization appeared in the PLA/POE blends, but the melting point of PLA did not change and melting area lessened little by little; the results of tensile test proved that POE could efficiently improve brittleness of PLA, however, tensile strength for blends decreased.

Key words: poly(lactic acid), ethylene-octene copolymer, blend, crystallization property, mechanical property