Adsorption, Mobility and Organization Molecules at Clay Surfaces Probed by Photophysics and Photochemistry

Abstract

DDMEMEC, adsorbed on a clay surface, has been polymerized by irradiating at 366 nm, using AIBN as initiator. I.R. and Raman spectroscopy were used to see whether polymerization took place or not. The advantage of Raman spectroscopy is that the aqueous suspension, could be measured immediately after irradiation. In figure 1 the raman spectra before and after irradiation are shown. Before irradiation a bond at 1660 reciprocal centimeters, which can be ascribed to the double bond of the monomer, is observed. This bond disappears after irradiation. This indicates that a polymerization took place. For the I.R. measurements, an attempt has been made to separate the polymer from the clay surface. This was done by adding 1N HCl to the clay suspension, followed by an extraction with chloroform. HCl is added to remove the polymer from the surface.

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Document Details

Document Type
Technical Report
Publication Date
Jun 15, 1988
Accession Number
ADA198645

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Absorption Spectra
  • Adsorption
  • Chemical Synthesis
  • Chemistry
  • Dispersions
  • Low Temperature
  • Molecules
  • Particle Size
  • Particles
  • Polymers
  • Raman Spectra
  • Raman Spectroscopy
  • Scattering
  • Spectra
  • Spectroscopy
  • Time Dependence
  • Viscosity

Fields of Study

  • Chemistry

Readers

  • Materials Science and Engineering.
  • Polymer Science and Engineering.
  • Thin Film Deposition Science.