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Time–temperature viscoelastic behavior of an interlaminar‐toughened epoxy composite
Author(s) -
Woo E. M.
Publication year - 1993
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.1993.070501002
Subject(s) - materials science , viscoelasticity , composite material , time–temperature superposition , composite number , epoxy , toughening , activation energy , atmospheric temperature range , phase (matter) , superposition principle , arrhenius equation , deformation (meteorology) , shear (geology) , thermodynamics , toughness , chemistry , physics , organic chemistry , quantum mechanics
Abstract Viscoelastic deformation of an interlaminar‐toughened laminated composite was investigated, and effects of the interlaminar heterogeneity were examined. Dynamic mechanical experiments were performed on the laminates and neat matrix resins of the laminated composite in the temperature range of 82–210°C to probe linear time‐temperature behavior. The reason for using torsional shear deformation for probing was that it usually is more dominated by the matrix. In the relatively low‐temperature regime, time‐temperature superposition was applicable, and the effect of the interlaminar heterogeneity was found to be not pronounced. A methodology based on the Arrhenius activation energy approach was proposed for predictions of long‐term viscoelasticity of the heterogeneous‐phase composite. The effects of the interlaminar toughening phase became more significant at temperatures greater than the T g of the toughening phase and presented some limitations for accurate predictions of time‐dependent behavior. © 1993 John Wiley & Sons, Inc.