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Particulate‐filled glassy polymers
Author(s) -
Narkis M.,
Joseph E.
Publication year - 1978
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.1978.070221217
Subject(s) - crazing , materials science , polymer , composite material , thermoplastic , stress–strain curve , deformation (meteorology)
Abstract Glass beads, NaCl crystals, or other imperfections act as stress concentrators in glassy polymers causing early crazing upon stressing. Stress–strain curves of glassy thermoplastic polymers filled with uncoupled glass beads or NaCl crystals exhibit a knee, or a slope‐discontinuity point. The characteristics of the slope change, related to crazing, are studied in the present work. Foams were produced from the polymer/salt samples by soaking them in water resulting in complete leaching of the salt. This preparation procedure gives open‐cell foams and there are strong indications that these polymeric foams have a highly cracked structure formed during the extraction step.