中文摘要：

通过改变加工工艺改善Mg（OH）2在HDPE中的分散性，先用双螺杆塑化挤出机混合造粒，再采用三螺杆动态混炼挤出机挤出造粒，对不同振动参数（振幅、频率）下制取的含不同质量分数Mg（OH）2的HDPE／Mg（OH）2复合材料进行研究，研究结果表明2三螺杆动态混炼挤出机有利于提高Mg（OH）2在复合材料中的分散性，从而提高复合材料的拉伸性能。Mg（OH）2质量分数分别为10％、20％、30％的复合材料的拉伸强度最大值分别为25．9、26．8、27．3MPa。

英文摘要：

By changing processing technology, the dispersion of Mg （OH） 2 in HDPE was improved. A twin-screw plastics extruder was used to make mixed granulator before HDPE/Mg（ OH）2 was pelletized by a tri-serew dynamic mixing extruder. The result dedicated that with the tri-serew dynamic mixing extruder, the dispersion of Mg （OH）2 and tensile property of composite materials were improved. The best tensile property of HDPE/ Mg （OH） 2 composite, whose contents of Mg （OH） 2 were 10 %,20 % and 30 %,were25.9,26.8 and 27.3 MPa.