PEG/N-100弹性体单向拉伸断裂行为

Unilateral Tension Fracture Behavior of PEG/N-100 Matrix

应用单向拉伸、扫描电镜等手段,研究了PEG/N-100弹性体的应力-应变关系和断裂行为。实验结果表明PEG/N-100弹性体的抗拉强度大于7MPa,屈服点抗拉强度接近于10MPa,断裂延伸率超过400%,并在断裂弹性体中发现7μm左右球晶生成;PEG/N-100弹性体的断裂是由微观裂纹生长成为细观裂纹,细观裂纹的生长和扩展最终导致弹性体断裂。

The stress-strain relations and fracture behavior of the PEG/N-100 matrix were investigated by methods of unilateral tensile testing, scanning electron microscopy, etc.. The experimental results indicate that maximum tensile strength of the PEG/N-100 matrix is above 7 MPa and approximately 10 MPa at the yield point, and the elongation percentage of fracture is over 400%. The spherulites of about 7 μm in diameter were found in the fractured matrix of PEG/N-100. The process of the matrix fracture has been proved to undergo the growth of micro-cracks, the expansion of micro-cracks and the final fracture of PEG/N-100 matrix.