Dissolution of a percolation cluster on UV-cured polymeric films: a fluorescence study

Pekcan O., Ugur S.

11th International Conference on Surface and Colloid Science, Iguassu Falls, Brazil, 01 September 2003, vol.128, pp.92-97 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 128
  • Doi Number: 10.1007/b97090
  • City: Iguassu Falls
  • Country: Brazil
  • Page Numbers: pp.92-97
  • Istanbul Technical University Affiliated: No


The steady-state fluorescence technique was used for studying dissolution of UV-cured polymer films. These films were formed from poly(methyl methacrylate) chains labeled with pyrene which was introduced as a fluorescence probe to monitor the dissolution processes. Poly(methyl methacrylate) films with various ethylene glycol dimethacrylate contents, cured by UV radiation for 3 and 25 h, were dissolved in chloroform-heptane (20-80%) mixtures. The percolation threshold (p(c) = 0.35) found for films irradiated for 3 h obeys the site percolation model, however the percolation threshold (p(c) = 0.25) measured for films irradiated for 25 h obeys the bond percolation model.