Synthesis of poly(n-hexyl isocyanate-b-N-vinylpyrrolidone) block copolymers by the combination of anionic and nitroxide-mediated radical polymerizations: Micellization properties in aqueous solutions

Panagiotis Bilalis, Georgia Zorba, Marinos Pitsikalis, Nikolaos Hadjichristidis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

A combination of anionic and nitroxide-mediated radical polymerizations (dual initiator) was employed for the synthesis of poly(n-hexyl isocyanate-b-N-vinylpyrrolidone) (PHIC-b-PNVP) block copolymers. The samples were characterized with a size exclusion Chromatograph equipped with refractive-index and light scattering detectors as well as 1H NMR spectroscopy. Relatively good control over the molecular weights was achieved. However, rather broad molecular weight distributions were obtained. The micellar properties of the PHIC-6-PNVP block copolymers were studied in water, which is a selective solvent for the poly(N-vinylpyrrolidone) blocks. Static and dynamic light scattering revealed the presence of equilibrium between the micelles and clusters. The clusters partially deaggregated with increasing temperature.

Original languageEnglish (US)
Pages (from-to)5719-5728
Number of pages10
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume44
Issue number19
DOIs
StatePublished - Oct 1 2006

Keywords

  • Anionic polymerization
  • Block copolymers
  • Micelles
  • N-vinylpyrrolidone
  • Nitroxide-mediated radical polymerization
  • n-hexyl isocyanate

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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