Optical anisotropy of linear and star polyisoprene by depolarized Rayleigh scattering

G. Fytas*, G. Floudas, N. Hadjichristidis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The absolute depolarized intensity R VH for linear and 12-arm star polyisoprene (PI) for a number of molecular weights and concentrations in CCl 4 has been obtained from the depolarized Rayleigh spectra recorded with a plane Fabry-Perot interferometer. The effective optical anisotropy <γ 2>/x(=10.4±0.8 angstrom 6) per monomer unit is virtually independent of concentration and molecular weight and is comparable to be optical anisotropy β 2 of the monomer unit calculated from the molecular geometry and bond anisotropies. The weak internal orientation correlations are consistent with a strain-birefringence data and rotational isomeric state model calculations for linear PI. Core effects are very weak for the 12-arm star PI considered here.

Original languageEnglish (US)
Pages (from-to)322-324
Number of pages3
JournalPolymer communications Guildford
Volume29
Issue number11
StatePublished - Nov 1988
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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