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

Sheila Devasahayam*

*Corresponding author for this work

Research output: Contribution to journalArticle

12 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 languageEnglish
Pages (from-to)3318-3327
Number of pages10
JournalJournal of Applied Polymer Science
Volume99
Issue number6
DOIs
Publication statusPublished - 15 Feb 2006
Externally publishedYes

Keywords

  • Activation energy
  • Adhesion
  • Coatings
  • FT-IR
  • Glass transition
  • Interfaces
  • Pigments

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