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利用正交设计和逐步2次回归分析的方法,研究了水滑石(LDHs)含量、螺杆转速和挤出次数对高密度聚乙烯(HDPE)/LDHs复合材料力学性能的影响。并用MATLAB对回归方程进行最优化处理,预测了复合材料在弯曲强度不低于25 MPa,缺口冲击强度不低于40 kJ/m~2条件下所得到的拉伸强度为29.558 3 MPa,并确定了此条件下的优化结果,即:LDHs含量为9.8%,螺杆转速为300 r/min,挤出次数为2次。此优化方案要好于常用的直观分析/方差分析的结果,更准确的反映实际情况,可更广泛的应用于优选试验中。
The effects of the content of hydrotalcite (LDHs), screw speed and extrusion times on the mechanical properties of high density polyethylene (HDPE) / LDHs composites were studied by orthogonal design and stepwise regression analysis. The regression equation was optimized by MATLAB and the tensile strength of the composite was predicted to be 29.558 3 MPa at a bending strength of not less than 25 MPa and a notched impact strength of not less than 40 kJ / m 2. Under these conditions, the optimized results, namely: LDHs content of 9.8%, screw speed of 300 r / min, the number of extrusion 2 times. This optimization scheme is better than the commonly used visual analysis / analysis of variance results, more accurately reflect the actual situation, can be more widely used in the preferred test.