Fluorescence of Vinyl Aromatic Polyelectrolytes: Effects of Conformation, Concentration, and Molecular Weight of Sodium Poly(styrenesulfonate)

Michael D. Major*, John M Torkelson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Conformational behavior of atactic sodium poly(styrenesulfonate) has been investigated by the use of fluorescence spectroscopy. Measurement of the excimer to monomer fluorescence intensity ratio, IE/Im, provides information relating to specific conformational populations in vinyl aromatic polymers. The overall size of the polyelectrolyte coils was varied extensively through control of ionic strength of the solvent, and the influence of the overall conformation of the polyelectrolyte on IE/IMwas monitored. As the shape of the chain changes from a highly extended, rodlike form to a loose coil, was found to be approximately constant, implying that local bond conformations are almost invariant. Increased molecular weight was found to increase IE/IMin a manner that cannot be explained solely on the basis of end effects. The concentration dependence of IE/IM was similar to that observed in polystyrene: no effect is seen for 0.01 ≤ c ≤ 2 g/L, and above 2 g/L IE/IMincreases only very gradually. Absorbance spectra were recorded and found to exhibit slight sensitivity to conformational changes.

Original languageEnglish (US)
Pages (from-to)2801-2806
Number of pages6
JournalMacromolecules
Volume19
Issue number11
DOIs
StatePublished - Jan 1 1986

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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