Development of self-healing epoxy composites via incorporation of microencapsulated epoxy and mercaptan in poly(methyl methacrylate) shell

Fatemeh Ahangaran, Mehran Hayaty*, Amir H. Navarchian, Yutao Pei, Francesco Picchioni

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

35 Citations (Scopus)
28 Downloads (Pure)

Abstract

Self-healing composites based on epoxy resin containing poly(methyl methacrylate) (PMMA) microcapsules filled with healing agents were prepared. The effect of healing agents microcapsules on mechanical properties and self-healing behavior of epoxy composites were investigated in this work. Epoxy and mercaptan as curing agent were microencapsulated in PMMA shell as two-component healing agent through internal phase separation method, and then, epoxy composites containing 2.5, 5, 7.5 and 10 wt% of healing agent microcapsules were prepared. The fracture toughness and healing efficiency of these composites were measured using a tapered double cantilever beam (TDCB) specimen. The results indicated that about 80% healing efficiency was achieved with 10 wt% PMMA microcapsules at room temperature after 24 h. The tensile strength of the epoxy with 2.5 wt % PMMA microcapsules increased initially and then decreased gradually with increasing microcapsules content up to 10 wt% PMMA microcapsules. DSC results also indicated that this system has good potential for spontaneous self-healing performance at room temperature.

Original languageEnglish
Pages (from-to)395-403
Number of pages9
JournalPolymer testing
Volume73
DOIs
Publication statusPublished - Feb-2019

Keywords

  • Epoxy composite
  • Healing agent
  • PMMA microcapsule
  • Mechanical properties
  • Self-healing behavior
  • FRACTURE-BEHAVIOR
  • CURING AGENT
  • MICROCAPSULES
  • POLYMER
  • SIZE
  • OIL

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