造纸剩余物竹屑含量对竹质纤维-高密度聚乙烯复合材料力学及热性能的影响

Effect of Bamboo Shavings Content on Mechanical and Thermal Properties of Bamboo Filler-High Density Polyethylene Composites

为探索造纸剩余物竹屑高效利用新途径,采用挤出成型工艺制备竹质纤维-高密度聚乙烯(HDPE)复合材料,探讨了不同质量分数竹屑对复合材料力学和热学性能的影响。结果表明:当竹屑质量分数为70%时,竹质纤维-HDPE复合材料综合力学性能较优;加入竹屑降低了复合材料起始分解温度,但提高了其高温耐烧蚀性;竹质纤维-HDPE复合材料结晶度随着竹屑质量分数的增加先上升后降低,当竹屑质量分数为60%时,复合材料结晶度较高,玻璃化转变温度最高,在承受动态载荷时刚性好,热变形小。

In order to explore a new way to use bamboo shavings of bamboo papermaking, bamboo filler-high polyethylene composites were prepared by extrusion process. The mechanical and thermal properties of the composites reinforced with different contents of bamboo sawdust were studied. The result indicated that the mechanical properties were better when bamboo sawdust content was up to 70%. The thermal stability of composites reinforced by bamboo sawdust was decreased while the ablative resistance was enhanced as the bamboo sawdust contents increasing. The de- gree of crystallinity of the composite was improved firstly then decreased with the increasing amount of bamboo saw- dust. The composites reinforced by 60% bamboo sawdust had a superior crystallinity and glass-transition temperature than others as well as a better dynamic mechanical property.