A new chemically stable stable self-healing materials system based on the tin-catalyzed polycondensation of phase-separated droplets of polydimethylsiloxane (HOPDMS) and polydiethoxysiloxane (PDES), was investigated. Some of the advantages of the system include the healing chemistry remains stable in humid or wet environments, the chemistry is stable to an elevated temperature that enables healing in high-temperature thermoset systems, and the widely available and low-cost components. The siloxane-based healing agent mixture in the new system is phase-separated in the matrix while the catalyst is encapsulated. The low solubility of siloxane-based polymers enables the HOPDMS-PDES mixture and catalyst containing microcapsules to be directly blended with the vinyl ester prepolymer, forming a distribution of phase-separated droplets and catalyst. The healing efficiency was calculated as the ratio of the critical fractured loads for the healed and virgin samples.

Original languageEnglish (US)
Pages (from-to)997-1000
Number of pages4
JournalAdvanced Materials
Issue number8
StatePublished - Apr 18 2006

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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