玻纤增强尼龙6的挤出工艺及力学性能

采用长玻纤连续添加和短切玻纤制备了玻纤增强尼龙6(PA6)复合材料。主要考察了玻纤含量、玻纤种类以及挤出工艺条件对复合材料力学性能的影响,并利用扫描电子显微镜对复合材料的冲击断面和拉伸断面及玻纤形态进行了观察。结果表明,采用短切玻纤加入时,玻纤含量对GF/PA6复合材料的力学性能影响很大。随玻纤含量的增加,复合材料的力学性能越来越高,断裂伸长率变低。加工工艺参数对复合材料的力学性能有影响。采用长玻纤连续添加时,玻纤的添加位置对复合材料的性能影响不大。在玻纤含量相同时,采用长玻纤连续添加得到的材料力学性能明显优于采用短切玻纤时的性能。玻纤能均匀地分散在PA6基体中,玻纤的保留长度和长度分布对复合材料的性能有直接影响。

Extrusion Process and Mechanical Properties of Glass Fiber Reinforced PA6

In this paper,glass fiber(GF)reinforced polyamide 6(PA6)composite was prepared by blending long GF and chopped GF respectively with PA6.The effects of GF content,type of glass fiber and extrusion process on mechanical properties of composite were investigated.The morphology of glass fiber in composite and the fracture surface in impact and tensile test were observed by SEM.The results showed that the content of chopped GF had influence in the mechanical properties of composite.The mechanical property was higher while the elongation at break dropped down.The processing parameters influenced the mechanical property of the composite,the feeding position of long continuous glass fiber showed little effect on the properties of composite.When the content of the GF was the same,the mechanical property of composite prepared from long continuous glass fiber was better than those from chopped glass fiber.The GF dispersed evenly in the PA6 matrix,and the length and its dispersion affected the property of the composite a lot.