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Adhesion of thermoplastic elastomer on surface treated aluminum by injection molding
Author(s) -
Fabrin P.A.,
Hoikkanen M.E.,
Vuorinen J.E.
Publication year - 2007
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20801
Subject(s) - materials science , insert (composites) , composite material , molding (decorative) , thermoplastic elastomer , elastomer , adhesion , thermoplastic , microstructure , porosity , penetration (warfare) , polymer , copolymer , operations research , engineering
Hybrid composites were prepared using insert injection molding without preheating. Thermoplastic elastomer (TPE) was overmolded on etched aluminum sheets having porous surface to provide large contact area between insert and TPE. The resulting bond strength was studied using a 180° peel test. The effect of aluminum microstructure and various processing steps of the surface treatment procedures on adhesion were studied. Maximum peel strength obtained was 9.33 N/cm using P2 treatment with alkaline‐acid pretreatment. Lowest peel strength of 1.68 N/cm was achieved by alkaline–acid treatment. Increasing insert thickness lowers the peel strength since large heat capacity of thicker insert cools the melt and limits penetration of the melt to insert microcavities. At certain insert thickness microcavities are impregnated by the melt and no additional effect can be obtained by decreasing the insert thickness. POLYM. ENG. SCI., 47:1187–1191, 2007. © 2007 Society of Plastics Engineers