INTERFACIAL CONSIDERATIONS IN POLYSULFIDE SEALANT BONDING.

A. M. Usmani*, R. P. Chartoff, W. M. Warner, J. M. Butler, I. O. Salyer, D. E. Miller

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The leak repair of integral fuel tank sealant on military aircraft is both tedious and costly. The current system uses a polysulfide sealant. A polyurethane coating is used on the tank interior surfaces prior to sealant application. The polysulfide sealant fills the cavities, seams and rivets. The sealant-coating combination works well initially and there is apparently adequate adhesion of the polysulfide rubber to the polyurethane coating. Upon extended aircraft usage, however, leaks do develop. In the reported experiments, the authors studied coating aging, use of primers, and determined factors governing coating-sealant interfacial integrity. The results obtained were analyzed in terms of the chemical reactions involved, attractive forces, and other bonding considerations. A mechanism of adhesion in polysulfide integral fuel tank sealants is proposed.

Original languageEnglish
Pages (from-to)1081-1095
Number of pages15
JournalRubber Chemistry and Technology
Volume54
Issue number5
DOIs
StatePublished - 1981

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

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