单向拉伸聚乙烯薄膜应力-应变曲线的分析

ANALYSIS ON STRESS-STRAIN CURVES OF UNIAXIALLY STRETCHED POLYETHYLENE FILM

采用拉伸实验的方法 ,研究了形变速率对半晶聚乙烯薄膜拉伸性能的影响 ,根据其应力 -应变曲线的形状 ,得出聚乙烯具有两个屈服点 ,研究了这两个屈服点与拉伸速率的关系 ,并从微观结构的角度对此进行了解释。

The effect of drawing speed on the strai n nature of semi crystal polyethylene was studied using the method of the plastic tensile testing. It is found that there are two yield points on each curve, base d on the shape of the stress-strain curves. The relationship of two yield point s with tensile testing was studied and expressed on the microstructure.