Abstract: The biodegradable meltblown non-woven fabric slice of poly (propylene carbonate)(PPC) / polypropylene(PP) was prepared by melt blending. The effect of the proportion of raw materials, blending temperature, blending time, blending speed on the mechanical properties of slice of poly (propylene carbonate)(PPC) / polypropylene(PP) was investigated, and melt flow rate, intrinsic viscosity, thermal properties, micro-morphology, degradation performance of different proportions of PPC/PP fabric slice also be investigated.The results shown that the influence of the proportion of raw materials for mechanical properties was significant, the tensile strength was 13.02MPa and the MFR was 3494g?(10min)-1 when the raw material ratio of PPC: PP was 7:3, blending temperature was 175℃, blending time was 5min, blending speed was 35r?min-1.The MFR was 1563g?(10min)-1 when the raw material ratio of PPC/PP was 6:4, it was accorded with meltblown non-woven fabric slice requirement. The thermal decomposition temperature of slices was improved more than PPC. It explained to the thermal stability can be impoved for adding the PP. The results of SEM shown that the slice of the ratio of PPC/PP was 7:3 was more smooth, had less depressions and cavities, the compatibility was better, and the degradation rate was 3.6198% in phosphoric acid buffer after a month.

Key words: poly(propylene carbonate), polypropylene, melt blending, biodegradable, slice for melt blown nonwovens