Blob Size Controls Diffusion of Free Polymer in a Chemically Identical Brush in Semidilute Solution
Zhang, Z., Edmondson, S., Mears, M. et al. (4 more authors)
(2018)
Blob Size Controls Diffusion of Free Polymer in a Chemically Identical Brush in Semidilute Solution.
Macromolecules, 51 (16).
pp. 6312-6317.
ISSN 0024-9297
Abstract
The diffusion of rhodamine-labeled poly(ethylene glycol) (r-PEG) within surface-grafted poly(ethylene glycol) (s-PEG) layers in aqueous solution at 18 °C was measured by fluorescence correlation spectroscopy. The diffusion coefficient of r-PEG within s-PEG was controlled by the grafting density, σ, and scaled as σ–1.42±0.09. It is proposed that a characteristic blob size associated with the grafted (brush) layer defines the region through which the r-PEG diffusion occurs. The diffusion coefficients for r-PEG in semidilute solution were found to be similar to those in the brushes.
Metadata
Authors/Creators:
Zhang, Z.
Edmondson, S.
Mears, M.
Madsen, P.J.
Armes, S.P.
Leggett, G.
Geoghegan, M.
Copyright, Publisher and Additional Information:
This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
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