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探讨了氧化铁颜料对木纤维-高密度聚乙烯复合材耐老化性能的改善作用。采用四种常用的氧化铁颜料与木纤维、高密度聚乙烯和其他加工助剂干混,并用自行设计的双螺杆/单螺杆双阶挤出机组制造木塑复合材料。对该木塑复合材料进行人工加速紫外循环老化处理,用CIE 1976L*a*b*表色体系和ASTM D790标准分别对老化前后的材料进行测试,结果显示加入颜料以后木塑复合材料的抗弯弹性模量没有明显的变化,但是弯曲强度都有一定程度的提高。经过2000h人工加速紫外老化以后,不论是颜色要是力学性能都发生了明显的变化。铁红和铁黑着色的试样在整个老化过程中表现较好,颜料添加量约2.28%比较适宜。图1表4参13。
The effect of iron oxide pigment on aging resistance of wood fiber-high density polyethylene composites was discussed. Four commonly used iron oxide pigments are used for dry blending with wood fiber, HDPE and other processing aids, and wood-plastic composites are manufactured using self-designed twin-screw / single-screw twin-extrusion units. The wood-plastic composites were subjected to artificial accelerated UV-cycle aging treatment. The materials before and after aging were respectively tested by CIE 1976 L * a * b * colorimetric system and ASTM D790 standard. The results showed that the WPC There is no obvious change of elastic modulus, but the bending strength is improved to some extent. After 2000h artificial accelerated UV aging, whether the color of the mechanical properties have undergone significant changes. Iron-red and iron-black colored samples performed well throughout the aging process, with pigment additions of about 2.28% being more appropriate. Figure 1 Table 4 Reference 13.