The effect of ultrasonic treatment on thermal stability of the cured epoxy/layered silicate nanocomposite

Nor Yuliana Yuhana, Sahrim Ahmad, A. R Shamsul Bahri

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7 Citations (Scopus)

Abstract

The effect of ultrasonic treatment on thermal stability of binary systems containing epoxy and organic chemically modified montmorillonite (Cloisite 30B) was studied. Differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), transmission electron microscopy (TEM), and wide angle X-ray diffraction (WAXD) analysis were utilized. The mixing of epoxy and Cloisite 30B nanocomposites was performed by mechanical stirring, followed by 1 or 3-hour ultrasonic treatment, and polyetheramine as the curing agent. Both XRD and TEM analyses confirmed that the intercalation of Cloisite 30B was achieved. The d 0 spacings for silicate in cured sample prepared at 1- and 3-hour duration of ultrasonic treatment were about 21 and 18Å, respectively. This shows that shorter duration or ultrasonic treatment may be preferable to achieve higher d 0 spacing of clay. This may be attributed to the increase in viscosity as homopolymerization process occurred, which restricts silicate dispersion. The 1-hour sonicated samples seem to be more thermally stable during the glass transition, but less stable during thermal decomposition process.

Original languageEnglish
Article number789815
JournalAdvances in Materials Science and Engineering
Volume2012
DOIs
Publication statusPublished - 2012

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Silicates
Nanocomposites
Thermodynamic stability
Ultrasonics
Transmission electron microscopy
Bentonite
Gravimetric analysis
Intercalation
Clay minerals
Homopolymerization
X ray diffraction analysis
Curing
Glass transition
Differential scanning calorimetry
Clay
Pyrolysis
Viscosity

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

Cite this

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title = "The effect of ultrasonic treatment on thermal stability of the cured epoxy/layered silicate nanocomposite",
abstract = "The effect of ultrasonic treatment on thermal stability of binary systems containing epoxy and organic chemically modified montmorillonite (Cloisite 30B) was studied. Differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), transmission electron microscopy (TEM), and wide angle X-ray diffraction (WAXD) analysis were utilized. The mixing of epoxy and Cloisite 30B nanocomposites was performed by mechanical stirring, followed by 1 or 3-hour ultrasonic treatment, and polyetheramine as the curing agent. Both XRD and TEM analyses confirmed that the intercalation of Cloisite 30B was achieved. The d 0 spacings for silicate in cured sample prepared at 1- and 3-hour duration of ultrasonic treatment were about 21 and 18{\AA}, respectively. This shows that shorter duration or ultrasonic treatment may be preferable to achieve higher d 0 spacing of clay. This may be attributed to the increase in viscosity as homopolymerization process occurred, which restricts silicate dispersion. The 1-hour sonicated samples seem to be more thermally stable during the glass transition, but less stable during thermal decomposition process.",
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AU - Ahmad, Sahrim

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