Hybrids of poly(ethylene oxide-co-epichlorhydrin) and silica: Phase separation, morphology and thermal properties

R. A. Zoppi*, Suzana Nunes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Hybrid materials of poly(ethylene oxide-co-epichlorhydrin), HYDRIN, and silica were prepared by a sol-gel process. An inorganic network was grown in a tetrahydrofuran/organic polymer solution from acid hydrolysis and polycondensation of tetraethoxysilane, TEOS. During solvent evaporation and simultaneous growth of the inorganic network, phase separation was observed. The mechanism of phase separation of these sol-gel systems was investigated by light scattering. Spinodal decomposition (SD) was observed for HYDRIN/TEOS systems with composition equal to 71/29, 67/33, 60/40, 50/50, 40/60, 33/67 and 29/71. The morphology of the final HYDRIN/TEOS hybrid material was investigated by scanning electron microscopy. The thermal properties of these materials were investigated by differential scanning calorimetry and their hydrophilicity was evaluated by contact angle measurements.

Original languageEnglish (US)
Pages (from-to)6195-6203
Number of pages9
JournalPolymer
Volume39
Issue number25
DOIs
StatePublished - Jan 1 1998

Keywords

  • Hybrids
  • Phase separation
  • Sol-gel process

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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