Hydrodynamic Radii of Polyethylene Glycols in Different Solvents Determined from Viscosity Measurements

The hydrodynamic radius, r h, of low molar mass polyethylene glycol, M PEG = (200 to 1000) g·mol−1, in a homologous series of primary alcohols, acetone, and toluene has been determined from viscosity measurements. The viscosity data have been collected using a fast one-point method as well as a more...

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Bibliographic Details
Published in:Journal of chemical and engineering data 2008-01, Vol.53 (1), p.63-65
Main Authors: Dohmen, Monique P. J, Pereira, Ana M, Timmer, J. Martin K, Benes, Nieck E, Keurentjes, Jos T. F
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 hydrodynamic radius, r h, of low molar mass polyethylene glycol, M PEG = (200 to 1000) g·mol−1, in a homologous series of primary alcohols, acetone, and toluene has been determined from viscosity measurements. The viscosity data have been collected using a fast one-point method as well as a more generally used multipoint method. The results for both approaches are in good agreement. For a given average molar mass of PEG, r h is the largest in acetone, methanol, and toluene and shows a decrease with the chain length of the alcohol. For the solvents studied, r h shows an increase with M PEG that can be described adequately by the two-parameter Mark–Houwink equation for M PEG = (400 to 1000) g·mol−1. In the range T = (298.2 to 323.2) K, the influence of the temperature is not significant.
ISSN:0021-9568
1520-5134
DOI:10.1021/je700355n