Development of a supramolecular accelerator simultaneously to increase the cross-linking density and ductility of an epoxy resin

Jiae Seo, Nobuhiko Yui, Ji-Hun Seo

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The development of a novel accelerator capable of simultaneously enhancing the cross-linking density and ductility of an epoxy resin without sacrificing the reaction rate is reported. The basic concept comprises the synthesis of a tertiary amine-functionalized polyrotaxane (PRX_NR1) accelerator: a molecular necklace structure that induces a high cross-linking density as well as active molecular movement. Fourier transform infrared spectroscopy and differential scanning calorimetry measurements confirmed that the PRX_NR1-containing epoxy resin afforded a high reaction rate. Furthermore, the cross-linking density and mechanical properties of the epoxy resin were confirmed by dynamic mechanical analysis and tensile testing. Consequently, the PRX_NR1-containing epoxy resin greatly increased the cross-linking density, thereby resulting in an increase in tensile strength and glass transition temperature. Interestingly, the epoxy resin exhibited a simultaneous increase in ductility which is important to avoid brittle fracture (low toughness) of the epoxy resins. These results indicate that the proposed molecular necklace-like supramolecular PRX_NR1 accelerator is highly effective to overcome the traditional drawbacks of an epoxy resin that pose significant problems in the industrial field.

Original languageEnglish
Pages (from-to)303-311
Number of pages9
JournalChemical Engineering Journal
Volume356
DOIs
Publication statusPublished - 2019 Jan 15

Keywords

  • Accelerator
  • Cross-linker
  • Ductility
  • Epoxy resin
  • Polyrotaxane

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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