SEM Analysis of Polymeric Mechanical Failures in Polyetherimide
Titel:
SEM Analysis of Polymeric Mechanical Failures in Polyetherimide
Auteur:
Zimmerman, D. L. Jones, R. W.
Verschenen in:
International journal of polymeric materials
Paginering:
Jaargang 23 (1994) nr. 3-4 pagina's 151-165
Jaar:
1994-02-01
Inhoud:
Different modes of fracture, which consisted of tension, bending, impact, biaxial flexure, torsion, fatigue, and cutting, were selected to determine fracture surface characteristics of polyetherimide under controlled conditions. Fractography, examination of fracture surfaces, was performed using a stereomicroscope and scanning electron microscope (SEM) to characterize and compare modes of failure. The stressed samples exhibited ductility, deformation, and finally brittle fracture shown by a primary fracture surface: mirror, transition region with mists and hackles, and a rough region with Wallner lines. The impacted samples exhibited stress cracking from the point of impact. The cut sample exhibited tear characteristics. Stress corrosion cracking was exhibited by dissolving polyetherimide in a partially halogenated hydrocarbon, trichloroethane.
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