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 language | English (US) |
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Pages (from-to) | 322-324 |
Number of pages | 3 |
Journal | Polymer communications Guildford |
Volume | 29 |
Issue number | 11 |
State | Published - Nov 1988 |
Externally published | Yes |
ASJC Scopus subject areas
- Engineering(all)