Transient decay studies of photophysical processes in aromatic polymers. 7. Studies of the molecular weight dependence of intramolecular excimer formation in polystyrene and styrene-butadiene block copolymers

D. Phillips, A. J. Roberts, Gary Rumbles, I. Soutar

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

A series of styrene homopolymers and styrene-butadiene block copolymers of type SB and SBSB in which the sequence length of styrene chromophores has been varied has been studied by time-resolved fluorescence techniques. It has been shown that the kinetic behavior of polystyrene fluorescence cannot be attributed to the existence of kinetically distinct monomeric species. The dual-exponential decays observed in the region of monomer emission are assigned to the influence of quenched monomer and excimer dissociation, respectively. The molar mass dependence of the polystyrene photophysics is best explained by models that assume energy migration to occur within (and, at low molecular weights, to be limited by) the chromophore sequence lengths.

Original languageEnglish
Pages (from-to)1597-1601
Number of pages5
JournalMacromolecules
Volume16
Issue number10
Publication statusPublished - 1983

ASJC Scopus subject areas

  • Materials Chemistry

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