Viscoelastic properties and thermal degradation kinetics of silica/PMMA nanocomposites

Yu Hsiang Hu, Chuh Yung Chen, Cheng Chien Wang

Research output: Contribution to journalArticlepeer-review

138 Citations (Scopus)

Abstract

PMMA-silica nanocomposites were prepared using a bulk polymerization technique. Three organic silica groups, two modified with methyl groups and the third an octane, made these inorganic silica particles more hydrophobic. These silica/PMMA nanocomposites exhibited higher storage and loss moduli than those of pristine PMMA. The Tg of these composites increased with the silica content. The thermal characteristics of these composites were also enhanced by incorporating silica into the PMMA matrix. The degradation temperature at 10% weight loss was approximately 30°C higher than that of pristine PMMA, depending upon the silica content. The rate of weight loss at 220°C for 2h was also markedly reduced in the presence of these modified silicas. The results might be attributed to "trapping effect". The activation energies for these silica/PMMA nanocomposites were enhanced according to Flynn, Ozawa-Flynn, and Kissinger methods.

Original languageEnglish
Pages (from-to)545-553
Number of pages9
JournalPolymer Degradation and Stability
Volume84
Issue number3
DOIs
Publication statusPublished - 2004 Jun 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Polymers and Plastics
  • Materials Chemistry

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