亚麻增强聚丙烯复合材料薄板的冲击性能

Impact resistance of flax reinforced polypropylene laminates

以亚麻纤维为增强体,与聚丙烯(PP)树脂长丝进行丝束级混合,形成PP包覆亚麻的纱线结构,利用机织工艺织成二维机织布,作为复合材料的预制件。采用层合热压的方法制备亚麻/PP复合材料薄板。通过对板材冲击性能的测试以及破坏形貌的分析,研究了亚麻/PP薄板的冲击破坏机制以及影响板材冲击性能的因素。结果表明:斜纹组织板材的冲击性能优于相同制备工艺的平纹组织板材;树脂、纤维、铺层数、冲击速度等因素对板材的冲击性能均有影响。

Flax fiber was used as the reinforcing material to commingle with polypropylene （PP） filaments, producing a core-spun yarn with the flax as core and PP filament as outer sheath. The commingled yams were woven into 2-D fabric which was used as the prefabricated material. By hot-pressing technology the prefabricated material was shaped into laminates. The fracture mechanisms and the factors affecting the impact resistance of the laminates were studied through analyzing the test results and fracture photographs. It showed that the impact resistance of the laminates with twill weave is prior to that with plain weave made by the same technological parameters. At the same time, the resin, reinforcing fiber, the number of layers and impact velocity all exert effects on the impact resistance.