Synthesis and properties of regular star polybutadienes with 32 arms

L. L. Zhou*, Nikolaos Hadjichristidis, P. M. Toporowski, J. Roovers

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

A dendrimer carbosilane containing 32 Si-Cl bonds in the perimeter has been prepared and has been used as a coupling agent to prepare 32-arm star polybutadienes. The dilute-solution properties 〈R G 2 〉, A 2 , [η], and D 0 have been measured in one good solvent and in one θ-solvent. The dimensions of the 32-arm star polymers are compared with those of linear polymers at constant molecular weight. It is shown that the 32-arm star polybutadiene has the characteristic properties of a hard-sphere molecule in dilute solution. The equivalent hard-sphere radii calculated from A 2 , D 0 and [η] are identical and 1.29 times larger than the root mean-square radius of gyration. The Daoud-Cotton scaling model for stars is also tested.

Original languageEnglish (US)
Pages (from-to)303-314
Number of pages12
JournalRubber Chemistry and Technology
Volume65
Issue number2
DOIs
StatePublished - Jan 1 1992

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

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