Separation by dynamic light scattering of internal motion in polymer coils from brownian motion

The coefficient of translational diffusion of a narrow-distribution polymer—poly(α-methylstyrene), M = 3.3 × 10 6—calculated from the low-frequency component of dynamically scattered light has been shown to coincide with the value determined by the classical method of macroscopic diffusion. The corr...

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Bibliographic Details
Published in:Polymer science USSR 1991, Vol.33 (3), p.603-609
Main Authors: Griko, N.B., Timchenko, A.A., Kipper, A.I., Baranovskaya, I.A., Lyubina, S.Ya, Klenin, S.I., Serdyuk, I.N.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
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Summary:The coefficient of translational diffusion of a narrow-distribution polymer—poly(α-methylstyrene), M = 3.3 × 10 6—calculated from the low-frequency component of dynamically scattered light has been shown to coincide with the value determined by the classical method of macroscopic diffusion. The correctness has been shown of a method for decomposing the correlation function into a low- and a high-frequency component, based on a program which makes use of a regularization algorithm. The method has been used to separate the large-scale motion in polymer chains from the motion of the macromolecule as a whole.
ISSN:0032-3950
1878-268X
DOI:10.1016/0032-3950(91)90265-R