纳米碳酸钙添加方式对竹塑复合材料力学及热性能的影响

Effect on the Mechanical and Thermal Properties of Polyethylene/Bamboo Pulp Fiber Composites by Different Method of Adding Nano-scale Calcium Carbonate

采用共混和浸渍两种纳米碳酸钙(CaCO_3)添加方式,通过挤出成型制备了竹浆纤维/高密度聚乙烯(HDPE)复合材料,并研究了两种添加方式制成的竹塑复合材料的力学、热学性能。结果表明:较共混法,采用浸渍法添加方式制备的竹塑复合材料弯曲和拉伸强度分别提高了1.06%和20.54%,弯曲和拉伸模量分别降低了3.6%和36.38%;浸渍法和共混法均能提高竹塑复合材料热稳定,较共混法,浸渍法复合材料起始分解温度(T_(?))提高了9.54℃,600℃残炭率提高了1.79%;两种添加方式对复合材料结晶温度、熔点和结晶度无影响。

Two ways ,mixing and impregnating, were used to add Nano-scale CaCO3 into bamboo pulp. And bamboo pulp fibers reinforced HDPE composites were prepared, and their mechanical and thermal properties were investigated. The results showed that compared to that using mixing process, the flexural and tensile strength of the composites prepared using impregnating process increased by 1.06% and 20.54% respectively, while the flexural and tensile modulus reduced by 3.6% and 36.38%. Both of the methods improved the thermal stability of the com- posites. Compared to that using mixing process, the decomposition temperature （ T1~ ）of the composites prepared using impregnating process increased by 9.54~C ,their char yield at 600~（2 increased by 1.79 %. CaCO3 adding methods had little effect on crystllization and melting temperature of the composites.