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Micromechanisms of high‐energy peel failure in polyester–aluminum–polyester laminates
Author(s) -
Brown D. J.,
Lamb P.,
Windle A. H.
Publication year - 1988
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.1988.070350201
Subject(s) - polyester , materials science , composite material , tearing , dissipation , aluminium , strain energy release rate , fracture mechanics , physics , thermodynamics
Symmetrical polyester‐aluminum‐polyester laminates are prepared using poly(ethylene terephthalate) film subjected to a glow discharge pretreatment. Extremely high peel energies (several hundred J m −2 ) are achieved, and the fracture path is principally cohesive: the laminate performance thus fully exploits the bulk mechanical properties of the PET. The peel surface exhibits extensive plasticity on a scale of tens of microns, with finer ductile tearing on a scale of order 1 μm. The mechanism of peel propagation and energy dissipation is discussed with regard to the optimisation of peel strength.