Morphology development of high‐density rigid polyurethane foam upon compression by on‐line scanning electronic microscope
Morphology development of high‐density rigid polyurethane foam upon compression by on‐line scanning electronic microscope
复制标题
DOI：
10.1002/app.26410
复制
发表时间：
2007-08
影响因子：
3
通讯作者：
Lei Shi;Zhong‐Ming Li
中科院分区：
文献类型：
--
作者：
Lei Shi;Zhong‐Ming Li
采用气密铸造法制备了高密度硬质聚氨酯泡沫塑料(RPUF)。用扫描电子显微镜(SEM)在线观察了RPUF压缩断裂过程中的形貌演变过程。在加载的早期阶段，试件的变形来自于细胞窗口的微小形状变化。随着载荷的增加，在加载的垂直方向上，一些蜂窝窗口会形成一些折痕，并随着载荷的增大而扩大，导致整个蜂窝的裂纹。此外，在变形过程中，最薄弱的部位形成了破坏带。©2007 Wiley期刊，Inc.J Appl Polym科学，2007
The high-density rigid polyurethane foam (RPUF) was obtained by airtight cast molding. The morphology development during the compressive fracture process of RPUF was observed on-line by a scanning electronic microscope (SEM). In the early stage of loading, the deformation of samples came from the tiny shape change in the cells' windows. As the load increases, some creases were formed in some cell windows in the vertical direction of loading, and the creases enlarged and resulted in the cracks across the whole cells. Moreover, during the deformation process, a failure band was formed in the weakest position. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007