AFM In-situ Bending Test on Deformation Behavior of Polyethylene Lamellar Structure
AFM In-situ Bending Test on Deformation Behavior of Polyethylene Lamellar Structure
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聚乙烯层状结构变形行为的AFM原位弯曲试验
DOI：
10.2472/jsms.53.1359
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Y. Tomita
中科院分区：
文献类型：
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作者：
K. Yashiro;Masayuki Kanai;Y. Tomita
本研究利用原子力显微镜原位弯曲试验直接观察了聚乙烯层板的变形行为。将聚乙烯的悬臂梁型试样在AFM台上弯曲，并按时间顺序扫描表面轮廓。从AFM图像的连续高度轮廓中定量评估了超过一百个lamps的旋转角、剪切和伸长。结果表明，各层片的变形与扫描区域的整体应变基本相关，但有些层片表现出不同的“夹杂”行为。我们还观察到了银纹的时间序列，这揭示了以下两个事实：（1）表面的不规则性导致银纹中的超原纤维，（2）发现超原纤维在变形的后期阶段断裂，收缩和湮灭。
In the present study, the deformation behavior of lamellae of polyethylene has been directly observed using the Atomic Force Microscopy in-situ bending test. A cantilever type specimen of polyethylene is bent on the AFM stage, and the surface profile is scanned in a time sequence. The rotation angle, shear and elongation of more than one hundred lamellae are quantitatively evaluated from the successive height profiles of AFM images. The result suggests that the deformation of each lamella is basically correlated with the global strain of scanned area, however, some lamellae show different behavior as “inclusion”. We also observed the onset of a craze in a time series, which reveals the following two facts; (1) the surface irregularity leads to the super-fibrils in a craze, (2) a super-fibril is found to break, shrink and annihilate in the later stages of deformation.