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Dynamic mechanical properties of very thin adhesive joints
Author(s) -
Krogh Ludovic,
Schawe Jürgen E. K.,
Possart Wulff
Publication year - 2015
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.42058
Subject(s) - materials science , composite material , dynamic mechanical analysis , glass transition , adhesive , polyurethane , plateau (mathematics) , shear modulus , deformation (meteorology) , shear (geology) , polymer , mathematical analysis , mathematics , layer (electronics)
The effective mechanical properties of a polyurethane adhesive (oligoetherdiol, ‐triol, MDI) in gold joints (bond line thickness, d P = 35–550 µm) are studied in the linear deformation range by dynamic mechanical analysis in shear mode. These properties depend on d P : thin ones possess a higher dynamic glass transition temperature and show a narrower glass transition than the thick ones. The storage modulus rises with decreasing d P for the rubbery plateau. The results attest mechanical interphases in the polyurethane with increased crosslink density and reduced cooperative mobility than in bulk. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42058.
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