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Interfacial fracture between highly crosslinked polymer networks and a solid surface [electronic resource] : Effect of interfacial bond density

Published
Washington, D.C. : United States. Dept. of Energy, 2000.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
29 pages : digital, PDF file
Additional Creators
Sandia National Laboratories, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
For highly crosslinked, polymer networks bonded to a solid surface, the effect of interfacial bond density as well as system size on interfacial fracture is studied molecular dynamics simulations. The correspondence between the stress-strain curve and the sequence of molecular deformations is obtained. The failure strain for a fully bonded surface is equal to the strain necessary to make taut the average minimal path through the network from the bottom solid surface to the top surface. At bond coverages less than full, nanometer scale cavities form at the surface yielding an inhomogeneous strain profile. The failure strain and stress are linearly proportional to the number of bonds at the interface unless the number of bonds is so few that van der Waals interactions dominate. The failure is always interfacial due to fewer bonds at the interface than in the bulk.
Report Numbers
E 1.99:sand2000-0760j
sand2000-0760j
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
03/23/2000.
"sand2000-0760j"
Macromolecules FT
STEVENS,MARK J.
Funding Information
AC04-94AL85000
View MARC record | catkey: 14449038