Properties of epoxy nanoclay system based on diaminodiphenyl sulfone and diglycidyl ether of bisphenol f: influence of post cure and structure of amine and epoxy

S.E. Ingram, J.J. Liggat, R.A. Pethrick

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Materials were prepared with Cloisite 30B, diglycidyl ether of bisphenol F and diaminodiphenyl sulfone (DDS) to investigate the relationship between exfoliation and property enhancement. A higher level of exfoliation was found with 4,4-DDS than in the material cured with 3,3-DDS. The material with 4,4-DDS that exhibited a higher degree of exfoliation also resulted in larger improvements in physical properties with nanoclay. Increasing the ratio of trifunctional to difunctional epoxy led to a significant decrease in the level of clay dispersion. Increasing the ratio of trifunctional epoxy in the nanocomposite also caused a decrease in Tg with the addition of nanoclay. However, an increase in Tg with increasing clay loadings was detected in samples with a higher degree of exfoliation, with only difunctional epoxy. Similar behaviour was found for samples with and without a post cure. Excessive post cure led to a decrease in thermal stability in Cloisite 30B-containing samples.
Original languageEnglish
Pages (from-to)1029-1034
Number of pages5
JournalPolymer International
Volume56
Issue number8
DOIs
Publication statusPublished - Aug 2007

Keywords

  • epoxy
  • Cloisite 30B
  • exfoliation
  • post cure

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