Towards improving wet-adhesion in a metal oxide-polymer coating system

Sheila Devasahayam

doi:10.1002/app.22759

Towards improving wet-adhesion in a metal oxide-polymer coating system

Sheila Devasahayam^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

An investigation using a variable radius roll adhesion test (VaRRAT) revealed an irreversible increase in the wet-adhesion in a metal-oxide-polymer system, under specific experimental conditions. This observation is further confirmed by the T _g measurements and the ATR-FTIR studies. The increase in wet-adhesion is attributed to late H ₂O-catalyzed curing of the previously partially cured polymers (epoxy ring opening), as well as the formation of nanocomposite layer within the epoxy primer matrix, because of precipitation of the nanocrystals including zinc ammine complexes formed as a result of dissolution of the zinc/ aluminum alloy as well as the metal oxide pigments by the amine crosslinker. High activation energy of ∼100 kJ mol ^-1 indicated a chemical process to be responsible for the adhesion gain.

Original language	English
Pages (from-to)	3318-3327
Number of pages	10
Journal	Journal of Applied Polymer Science
Volume	99
Issue number	6
DOIs	https://doi.org/10.1002/app.22759
Publication status	Published - 15 Feb 2006
Externally published	Yes

Keywords

Activation energy
Adhesion
Coatings
FT-IR
Glass transition
Interfaces
Pigments

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10.1002/app.22759

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abstract = "An investigation using a variable radius roll adhesion test (VaRRAT) revealed an irreversible increase in the wet-adhesion in a metal-oxide-polymer system, under specific experimental conditions. This observation is further confirmed by the T g measurements and the ATR-FTIR studies. The increase in wet-adhesion is attributed to late H 2O-catalyzed curing of the previously partially cured polymers (epoxy ring opening), as well as the formation of nanocomposite layer within the epoxy primer matrix, because of precipitation of the nanocrystals including zinc ammine complexes formed as a result of dissolution of the zinc/ aluminum alloy as well as the metal oxide pigments by the amine crosslinker. High activation energy of ∼100 kJ mol -1 indicated a chemical process to be responsible for the adhesion gain.",

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AB - An investigation using a variable radius roll adhesion test (VaRRAT) revealed an irreversible increase in the wet-adhesion in a metal-oxide-polymer system, under specific experimental conditions. This observation is further confirmed by the T g measurements and the ATR-FTIR studies. The increase in wet-adhesion is attributed to late H 2O-catalyzed curing of the previously partially cured polymers (epoxy ring opening), as well as the formation of nanocomposite layer within the epoxy primer matrix, because of precipitation of the nanocrystals including zinc ammine complexes formed as a result of dissolution of the zinc/ aluminum alloy as well as the metal oxide pigments by the amine crosslinker. High activation energy of ∼100 kJ mol -1 indicated a chemical process to be responsible for the adhesion gain.

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KW - Adhesion

KW - Coatings

KW - FT-IR

KW - Glass transition

KW - Interfaces

KW - Pigments

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Towards improving wet-adhesion in a metal oxide-polymer coating system

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Keywords

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