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采用挤塑模压的方法制备麦秸纤维增强聚丙烯复合材料,研究了麦秸纤维添加量、尺寸及马来酸酐接枝聚丙烯(MAPP)添加量、温度对麦秸纤维增强聚丙烯复合材料熔融流变性的影响。麦秸纤维添加量从10 wt%增加至30 wt%时,复合材料的熔融黏度增加。马来酸酐接枝聚丙烯的加入提高了体系的流动性,熔融黏度降低。麦秸纤维以长纤维和纤维束作为增强材料时,复合材料的熔融黏度降低,以细小纤维作为增强材料时,复合材料的熔融黏度增加。温度由170℃升高至190℃,剪切速率由0.01 s-1增加至0.1 s-1时,麦秸纤维增强聚丙烯复合材料的黏度降低。
The straw fiber reinforced polypropylene (PP) composites were prepared by extrusion molding. The effects of the amount and size of wheat straw fiber and the amount of MAPP and the temperature on the melt rheological properties of wheat straw fiber reinforced polypropylene composites influences. When the amount of wheat straw fiber increased from 10 wt% to 30 wt%, the melt viscosity of the composites increased. The addition of maleic anhydride grafted polypropylene increases the fluidity of the system and decreases the melt viscosity. The melt viscosity of the composites decreases with the long fibers and the fiber bundles as the reinforcing material. When the fine fibers are used as the reinforcing material, the melt viscosity of the composites increases. When the temperature increased from 170 ℃ to 190 ℃ and the shear rate increased from 0.01 s-1 to 0.1 s-1, the viscosity of wheat straw fiber-reinforced polypropylene composites decreased.