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Article
Fluorescence Excitation Spectroscopy of Polystyrene Near the Critical Concentration c*
Journal of Applied Polymer Science (2007)
  • James E Hanson, Seton Hall University
  • M Sean Healy, Seton Hall University
Abstract

The critical concentration c* was measured using both fluorescence excitation spectroscopy and light scattering for four narrow molecular weight distribution samples of polystyrene (MW = 225,000 – 1,500,000) in bicyclo[4.4.0]decane (decahydronaphthalene, decalin) at 20ºC and 30ºC. A discontinuity in the corrected intensity of a band in the excitation spectrum (assigned to the dimmer complex) as a function of concentration allowed determination of the critical concentration, c*, from the excitation spectra. The c* results from fluorescence and light scattering were identical within experimental error and were comparable to c* values calculated from literature methods. Fluorescence excitation spectroscopy should be a convenient method for determining c* for aromatic polymers.

Keywords
  • polymer phase diagram,
  • excitation spectroscopy
Publication Date
2007
Citation Information
M. Sean Healy, James E. Hanson. "Fluorescence Excitation Spectroscopy of Polystyrene Near the Critical Concentration c*" Journal of Applied Polymer Science 104 (2007): 360-364.