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Adhesive properties of DGEBA–acid homopolymer and DGEBA–acid copolymer systems
Author(s) -
Laref F. Heba,
Mouzali M.
Publication year - 1995
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.1995.070551005
Subject(s) - adhesive , copolymer , materials science , epoxy , polystyrene , adhesion , acrylic acid , wetting , polymer chemistry , composite material , shear strength (soil) , polymer , environmental science , layer (electronics) , soil science , soil water
Adhesive properties of high molecular weight acid copolymers used as hardeners for a commercial epoxy resin are investigated. For comparative purposes, physical blends of poly(acrylic acid)–polystyrene are used as hardeners. Joints prepared from physical blends exhibit lower lap shear strength than do those prepared form synthesis products. The use of copolymers is more adequate. Thermodynamic work of adhesion using wettability criteria is explored to explain the differences. The apparent energies of rupture determined by lap shear tests are 10 3 higher than those of the thermodynamic work of adhesion. © 1995 John Wiley & Sons, Inc.