Impact of thiourethane filler surface functionalization on composite properties

André L. Faria-e-Silva, Andressa dos Santos, Emerson M. Girotto, Carmem Pfeifer

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Thiourethane oligomers added to methacrylate matrices improve fracture toughness and reduce polymerization stress. In this study, the oligomers are added to the surface of inorganic fillers in the formulation of resin composites. Systematically varied fillers treated either with the thiourethane or a methacrylate silane control are tested. Thiourethane reduces the rate of polymerization of light-cured composites but does not affect the final degree of conversion. Filler functionalization with thiourethane increases the depth of polymerization, in filler type-dependent fashion. Thiourethane reduces the polymerization stress for all fillers. The findings suggest that this approach results in the same general effects with the addition of thiourethanes directly to the matrix. This is accomplished with a lower overall concentration of thiourethane, and with no prejudice to the handling characteristics of the material.

Original languageEnglish (US)
Article number47687
JournalJournal of Applied Polymer Science
Volume136
Issue number25
DOIs
StatePublished - Jul 5 2019

Keywords

  • fracture toughness
  • polymerization
  • polymerization stress
  • pre-polymerized additives
  • resin composites

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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