Volume 37, Issue 11 pp. 3105-3117
Article
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Polyethylene adhesion: Pretreatment with potassium permanganate

Ricardo Aurélio Da Costa

Ricardo Aurélio Da Costa

Instituto de Química, Universidade Estadual de Campinas, 13081 Campinas SP, Brazil

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Maria Do Carmo Gonçalves

Maria Do Carmo Gonçalves

Instituto de Química, Universidade Estadual de Campinas, 13081 Campinas SP, Brazil

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Marcelo Ganzarolli De Oliveira

Marcelo Ganzarolli De Oliveira

Instituto de Química, Universidade Estadual de Campinas, 13081 Campinas SP, Brazil

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Adley Forti Rubira

Adley Forti Rubira

Instituto de Química, Universidade Estadual de Campinas, 13081 Campinas SP, Brazil

Universidade Estadual de Maringá, Maringá PR, Brazil.

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Fernando Galembeck

Corresponding Author

Fernando Galembeck

Instituto de Química, Universidade Estadual de Campinas, 13081 Campinas SP, Brazil

Instituto de Química, Universidade Estadual de Campinas, 13081 Campinas SP, Brazil===Search for more papers by this author
First published: 5 June 1989
Citations: 5

Abstract

Two major events occur in the modification of polyethylene (PE) surfaces by treatment with acidic KMnO4 solutions: The polymer surface is coated with a porous MnO2 layer and corroded, by oxidation. In both cases the resulting surfaces may be bonded with epoxy; the average peeling force for LDPE/epoxy/LDPE adhesive joints thus obtained may reach > 1.6 kN m−1 and is limited by adherend cohesive failure. Modified LDPE surfaces and disassembled joints were examined by transmission and ATR-IR spectrophotometry, to show that corroded, nonwettable LDPE contains appreciable amounts of polar groups, reactive towards epoxy amine components.

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