Characterization of epoxies cured with bimodal blends of polyetheramines

Ian M. McAninch, Giuseppe R. Palmese, Joseph L. Lenhart, John J. La Scala

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29 Scopus citations


DGEBA was cured with bimodal blends of polyetheramines as well as with single molecular weight amines while maintaining stoichiometry. Glass transition temperatures (Tgs) and moduli were measured using dynamic mechanical analysis (DMA). Fracture properties were measured using the compact tension geometry and testing was performed at both ambient and non-ambient temperatures, investigating toughness changes as a function of temperature. For constant amine average molecular weights, the addition of high molecular weight amines caused increased glassy moduli at a constant T - Tg and decreased densities while broadening the glass transition without changing the fracture toughness. The fracture behavior, specifically the slip-stick to brittle transition, was affected by the broadened transitions. Tg, breadth of Tg, and total damping were found to be proportional to the volume fraction of amine in the system.

Original languageEnglish (US)
Pages (from-to)1621-1631
Number of pages11
JournalJournal of Applied Polymer Science
Issue number3
StatePublished - Nov 5 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

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


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