Electron beam and UV cationic polymerization of glycidyl ethers PART II: Reaction of diglycidyl ether of bisphenol A

Matteo Mascioni, Narendra N. Ghosh, James M. Sands, Giuseppe R. Palmese

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Electron-beam (e-beam) and ultraviolet (UV)-induced cationic polymerization of diglycidyl ether of bisphenol A (DGEBA) using the photo-initiator diaryliodonium hexafluoroantimonate was investigated using in situ NIR spectroscopy. The effect of processing parameters, such as temperature, radiation intensity, and photo-initiator concentration, on kinetics of the reaction were determined quantitatively. In contrast to the behavior of monofunctional epoxy systems reported previously, the difunctional epoxy forms a high Tg crosslinked network, so a kinetic model that takes into account diffusion limitations associated with vitrification was developed. The combined benefits of the real-time in situ NIR spectroscopy study and the well-defined diffusion model resulted in very accurate predictions for cure of epoxy networks by e-beam-induced polymerization. The results support the view that e-beam processing of epoxies is constrained by vitrification in the same way that UV and thermally cured epoxies are.

Original languageEnglish (US)
Pages (from-to)487-495
Number of pages9
JournalJournal of Applied Polymer Science
Volume130
Issue number1
DOIs
StatePublished - Oct 5 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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