Star-branched polystyrenes by nitroxide living free-radical polymerization

Thodoris Tsoukatos, Stergios Pispas, Nikos Hadjichristidis

Research output: Contribution to journalArticlepeer-review

97 Scopus citations


Star-branched polystyrenes, with polydispersity indices of 1.15-1.56 and 4-644 equal arms, were synthesized by the reaction of 2,2,6,6-tetramethylpiperidin-1-yloxy (TEMPO)-capped polystyrene (PS-T) with divinylbenzene (DVB). The characterization of PS-T and the final star polymers was carried out by size exclusion chromatography, low-angle laser light scattering, and viscometry. The degree of branching of the star polymers depended on the DVB/PS-T ratio and the PS-T molecular weight. An asymmetric (or miktoarm) star homopolymer of the PSnPS′n type was made by the reaction of the PSn symmetric star, which had n TEMPO molecules on its nucleus and consisted of a multifunctional initiator, with extra styrene.

Original languageEnglish (US)
Pages (from-to)320-325
Number of pages6
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Issue number2
StatePublished - Jan 15 2001
Externally publishedYes

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry


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