Volume 48, Number 2, October II 1999
|Page(s)||150 - 155|
|Section||Atomic and molecular physics|
|Published online||01 September 2002|
Where do polymer adhesives fail?
Department of Physics and Astronomy, The Johns Hopkins University Baltimore, MD 21218, USA
Accepted: 24 August 1999
We use molecular-dynamics simulations of a polymer film confined between two walls to isolate the factors that control where an adhesive bond breaks. Failure occurs either at the wall/film interface (adhesive failure) or within the film (cohesive failure). Most theories relate the location of failure to equilibrium interfacial free energies. However, we find that the location of failure coincides with the region of lowest initial yield stress and cannot be predicted from equilibrium interfacial free energies.
PACS: 36.20.Ey – Conformation (statistics and dynamics) / 61.41.+e – Polymers, elastomers, and plastics / 68.35.Gy – Mechanical and acoustical properties; adhesion
© EDP Sciences, 1999
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