Synthesis of Epoxy and Block Oligomer Modified Clay Nanocomposite

Abstract

Acrylic triblock (A(x)M(y)B(z)) and diblock (M(y)B(z)) oligomers containing methyl methacrylate (MMA, M), methacrylic acid (MAA, A) and dimethylaminoethyl methacrylate (DMAEMA, B) groups are intercalated into the layers of montmorillonite. The results indicate that the block oligomer lay flatly between the clay layers. ICP analyses of N(+) content indicate no unexchanged sodium ions are left in the intercalated clay. Nanocomposites of epoxy and clay modified with block oligomers were synthesized. Glass transition temperature (T(sub g)) of the nanocomposite is 129.6 deg C (M18B24(24+) modified clay) compared to 84.1 deg C for the physical mixture of epoxy and unmodified clay. T(sub g) increases with decreasing amount of modified clay. When modified clay content are below 2 phr, T(sub g) higher than 131.7 deg C can be obtained. Water resistance and light transmittance of the nanocomposite is also improved over composite of epoxy and unmodified clay.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2001
Accession Number
ADP012255

Entities

People

  • Kang-hung Chen
  • Sze-ming Yang

Organizations

  • National Central University

Tags

DTIC Thesaurus Topics

  • Block Copolymers
  • Ceramic Materials
  • Charge Density
  • Composite Materials
  • Engineering
  • Epoxy Composites
  • Epoxy Resins
  • Glass Transition Temperature
  • Hydrophobic Properties
  • Inorganic Materials
  • Materials
  • Nanocomposites
  • Oligomers
  • Phyllosilicates
  • Resins
  • Transition Temperature
  • Universities

Fields of Study

  • Materials science

Readers

  • Geotechnical Engineering.
  • Polymer Science and Technology
  • Reinforced Composite Materials