Morphology development in epoxy/polymer systems

Thermosetting epoxy micro particles with a thermoplastic shell

Eamor Woo, H. Kun Hseih

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A novel method based on phase inversion and inter-boundary reaction in a reactive system comprising a thermoplastic phenoxy and a thermosetting epoxy has been proposed to design micro epoxy particles with a thermoplastic polymer shell. Due to the hydroxyl group in phenoxy, inter-domain reactions were found to lead to a chemical link between the polymer and the epoxy network. As cure progressed, the phenoxy component was first expelled out of the epoxy spheres at initial stages of cure and a phase-separated morphology was set. Subsequently, the pendant -OH groups in the phenoxy shells were grafted onto the outer surfaces of the epoxy core particles (3-4 μm) at high enough temperatures (187°C or higher) during later stages of cure. This paper describes the mechanisms and fundamental phenomenon under which this unique method of preparing polymer/epoxy spheres (epoxy cores/phenoxy shell) of controlled sizes can be realized. Several factors have been found to affect the geometry of the epoxy spheres and the chemical bondings between the polymer and epoxy.

Original languageEnglish
Pages (from-to)7-13
Number of pages7
Journalpolymer
Volume39
Issue number1
DOIs
Publication statusPublished - 1998 Jan 1

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Thermoplastics
Polymers
Hydroxyl Radical
Geometry
Temperature

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics

Cite this

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title = "Morphology development in epoxy/polymer systems: Thermosetting epoxy micro particles with a thermoplastic shell",
abstract = "A novel method based on phase inversion and inter-boundary reaction in a reactive system comprising a thermoplastic phenoxy and a thermosetting epoxy has been proposed to design micro epoxy particles with a thermoplastic polymer shell. Due to the hydroxyl group in phenoxy, inter-domain reactions were found to lead to a chemical link between the polymer and the epoxy network. As cure progressed, the phenoxy component was first expelled out of the epoxy spheres at initial stages of cure and a phase-separated morphology was set. Subsequently, the pendant -OH groups in the phenoxy shells were grafted onto the outer surfaces of the epoxy core particles (3-4 μm) at high enough temperatures (187°C or higher) during later stages of cure. This paper describes the mechanisms and fundamental phenomenon under which this unique method of preparing polymer/epoxy spheres (epoxy cores/phenoxy shell) of controlled sizes can be realized. Several factors have been found to affect the geometry of the epoxy spheres and the chemical bondings between the polymer and epoxy.",
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Morphology development in epoxy/polymer systems : Thermosetting epoxy micro particles with a thermoplastic shell. / Woo, Eamor; Hseih, H. Kun.

In: polymer, Vol. 39, No. 1, 01.01.1998, p. 7-13.

Research output: Contribution to journalArticle

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