Static Light Scattering Study of High Molecular Weight 18-Arm Star Block Copolymers

Anh B. Nguyen, Nikolaos Hadjichristidis, Lewis J. Fetters

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Light scattering studies on very high molecular weight 18-arm star poly(styrene-isoprene) block copolymers have been done by using, in part, isorefractive solvents. The radius of gyration of the polystyrene outer blocks is expanded to approximately the same size as the whole macromolecule while that of the polyisoprene inner segment assumes the dimensions of a homopolyisoprene star of equivalent molecular weight and functionality. The shape of the polystyrene outer blocks resembles that predicted for a hollow star. The findings support the presence of a segregated vesicle-like conformation in dilute solution.

Original languageEnglish (US)
Pages (from-to)768-773
Number of pages6
JournalMacromolecules
Volume19
Issue number3
DOIs
StatePublished - Jan 1 1986

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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