水下搅拌摩擦加工制备碳纳米管增强PE-HD结构与拉伸性能研究

摘要

In this paper,we reported the preparation of high-density polyethylene (PE-HD)/multiwalled carbon nanotubes (MWCNTs) composites through a submerged friction stir processing method,and effects of rotation speed and content of MWCNTs on morphologies and properties of the composites was investigated.The results indicated that MWCNTs were homogeneously dispersed in the matrix in the form of a “cloud”.For the case of the composites containing 1 wt ％ and 2 wt ％ of MWCNTs,the tensile strength increased at first and then tended to decrease with an increase of rotational speed.However,the composite containing 4 wt ％ of MWCNTs exhibited a continuous increase in tensile strength with an increase of rotational speed.A differential scanning calorimetric investigation indicated that the degree of crystallinity of PE-HD was reduced with an increase of the content of MWCNTs.%通过水下搅拌摩擦加工技术制备多壁碳纳米管(MWCNTs)增强高密度聚乙烯(PE-HD)复合材料,并研究了旋转速度和MWCNTs含量对复合材料结构和性能的影响.结果表明,MWCNTs在基体中以云状形式分布,组织相对均匀;MWCNTs含量为从1％(质量分数,下同)增加到2％时,复合材料拉伸强度随着旋转速度的增加先增大后减小;MWCNTs含量为4％时,复合材料拉伸强度随着旋转速度的增加而减小;PE-HD的结晶度随着MWCNTs含量的增加而下降.