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Dynamic light‐scattering studies of poly(γ‐benzyl α, l‐glutamate)–benzyl alcohol system
Author(s) -
Shukla Premal,
Muthukumar M.,
Langley Kenneth H.
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070441207
Subject(s) - benzyl alcohol , rotational diffusion , dynamic light scattering , diffusion , phase (matter) , isotropy , light scattering , scattering , materials science , polymer , scaling , chemistry , thermodynamics , polymer chemistry , chemical physics , optics , physics , organic chemistry , catalysis , composite material , molecule , geometry , mathematics , nanoparticle , nanotechnology
We report the concentration and temperature dependencies of the diffusion coefficients obtained from dynamic light‐scattering studies for the poly(γ‐benzyl α, l‐glutamate)‐benzyl alcohol (PBLG–BA) system. These studies were made at dilute and semidilute polymer concentrations, mainly in the isotropic phase. The measured translational and rotational diffusion coefficients in dilute solutions are consistent with predictions based on wormlike chain models. The mutual diffusion coefficient in semidilute solutions shows a marked deviation from scaling predictions, demonstrating the strong coupling between the translational and rotational motions. The measured time evolution of the scattered intensity after the PBLG–BA system is suddenly quenched into the gel phase demonstrates that aggregation is a significant mechanism in the formation of the gel phase.