Association behavior of linear co-functionalized polybutadienes in cyclohexane

Marinos Pitsikalis, Ekaterini Siakali-Kioulafa, Nikos Hadjichristidis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The dilute solution properties of linear polybutadienes with dimethylamine and zwitterionic end groups were studied by membrane osmometry (MO), low-angle laser light scattering (LALLS), viscometry, and dynamic light scattering (DLS) in cyclohexane. The polymers were prepared by anionic polymerization, under high vacuum conditions using [3-(dimethylamino)propyl]lithium as initiator. The dimethylamine groups were converted to zwitterions by reaction with cyclopropane sultone. No evidence of association was found for the amine-capped polymers, whereas the zwitterionic samples exhibited strong association in cyclohexane. The degrees of association increase by decreasing molecular weight of the base polymer due to the excluded volume repulsions. These aggregation numbers are of the same order as those found for ω-functionalized polyisoprenes, with the same polar groups in the same solvent. The hydrodynamic properties, measured by viscometry and dynamic light scattering, supported the conclusions drawn by LALLS and provide strong evidence that the aggregates behave hydrodynamically as star polymers. Comparison with theoretical models shows that the association behavior is best described by the linear head packing model.

Original languageEnglish (US)
Pages (from-to)249-259
Number of pages11
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume34
Issue number2
StatePublished - 1996
Externally publishedYes

Keywords

  • ω-functionalized polybutadienes
  • Association
  • Cyclohexane
  • Sulfozwitterion end groups
  • Synthesis

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Association behavior of linear co-functionalized polybutadienes in cyclohexane'. Together they form a unique fingerprint.

Cite this