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Morphology development of high‐density rigid polyurethane foam upon compression by on‐line scanning electronic microscope
Author(s) -
Shi Lei,
Li ZhongMing
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26410
Subject(s) - polyurethane , composite material , materials science , deformation (meteorology) , scanning electron microscope , compression molding , compression (physics) , morphology (biology) , microscope , molding (decorative) , compressive strength , optics , mold , genetics , physics , biology
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