Abstract: Polycaprolactone (PCL)/poly(lactic acid) (PLA)/bamboo fiber (BF) composites were prepared by compression molding. The effects of PCL/PLA mass ratio, contents of BF and silane coupling agent on mechanical properties of the composites were investigated. The results indicated that the composites achieved the maximum values of 11.26 kJ/m2, 12.68 MPa and 5.2 % in impact strength, tensile strength and elongation at break, respectively, at a PCL/PLA mass ratio of 1∶1 with 40 wt % of BF. The composites also gained the optimal values of 15.11 kJ/m2, 13.15 MPa and 5.8 % in impact strength, tensile strength and elongation at break, respectively, when BF was modified with 1.0 wt % of silane coupling agent. In addition, the composites obtained the optimal values of 15.11 kJ/m2, 13.15 MPa and 5.8 % in impact strength, tensile strength and elongation at break, respectively, when compression molding was carried out at 150 ℃.

Key words: polycaprolactone, poly（lactic acid）, bamboo fiber, composite, mechanical property