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利用倒三角形排列三螺杆挤出机与传统双螺杆挤出机对不同黏度比的聚丙烯/高密度聚乙烯(PP/PE-HD)体系进行混炼加工,研究了三螺杆挤出机中剪切-拉伸交变流场对于高黏度比聚合物两相体系的分散混合及分布混合效果的影响;并通过高黏度比体系的混合效果证明三螺杆挤出机中剪切-拉伸交变流场的作用效果及机理。结果表明,在高黏度比体系的加工中,倒三角形排列三螺杆挤出机分散与分布混合效果明显优于双螺杆挤出机,且三螺杆挤出机的增韧效果随着体系黏度比的增大而提升。
The PP / PE-HD system with different viscosity ratio was kneaded by inverted triangle arrangement tri-screw extruder and conventional twin-screw extruder. The effects of shear Shear-alternating alternating current flow field for high-viscosity polymer dispersion and mixing of the two-phase mixture distribution and mixing effect; and high viscosity than the mixing effect of the system proved that the three-screw extruder shear - tensile alternating The effect and mechanism of flow field. The results show that in the process of high viscosity ratio system, the effect of dispersion and distribution of inverted triangular arrangement three-screw extruder is better than that of twin-screw extruder. The toughening effect of three-screw extruder with the viscosity ratio Increase and enhance.