Dynamic surface properties of solutions of poly(ethylene oxide) and polyethylene glycols

B. A. Noskov, A. V. Akentiev, G. Loglio, R. Miller

Research output

78 Citations (Scopus)

Abstract

The damping coefficient and the length of transversal (at the frequencies from 100 to 300 Hz) and longitudinal (at the frequencies from 0.1 to 3 Hz) surface waves have been measured as a function of the concentration of solutions of poly(ethylene glycol)s (PEG) and poly(ethylene oxide) (PEO), and the molecular weight of the polymer. A local maximum of the damping coefficient of transversal waves has been discovered for dilute solutions of PEG 400. This maximum disappears and the damping coefficient decreases monotonically with the concentration of polymers of higher molecular weight in the region of dilute solutions. A fast increase of the damping with concentration has been discovered for semidilute solutions. These experimental data are used for the calculation of the real and imaginary components of the dynamic surface elasticity as a function of concentration and frequency. The obtained dependencies can be explained with the help of a dynamic model of the surface layer of polymer solutions where the main relaxation processes are connected with the monomer exchange between different regions of the surface layer. In the investigated concentration range, the corresponding relaxation time determined from the experimental data changes by more than 2 orders of magnitude.

Original languageEnglish
Pages (from-to)7923-7931
Number of pages9
JournalJournal of Physical Chemistry B
Volume104
Issue number33
Publication statusPublished - 24 Aug 2000

Fingerprint

ethylene oxide
Polyethylene oxides
surface properties
Polyethylene glycols
Surface properties
glycols
polyethylenes
Damping
damping
Polymers
Molecular weight
molecular weight
surface layers
polymers
coefficients
Relaxation processes
Polymer solutions
Surface waves
Relaxation time
Elasticity

Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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AU - Noskov, B. A.

AU - Akentiev, A. V.

AU - Loglio, G.

AU - Miller, R.

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Y1 - 2000/8/24

N2 - The damping coefficient and the length of transversal (at the frequencies from 100 to 300 Hz) and longitudinal (at the frequencies from 0.1 to 3 Hz) surface waves have been measured as a function of the concentration of solutions of poly(ethylene glycol)s (PEG) and poly(ethylene oxide) (PEO), and the molecular weight of the polymer. A local maximum of the damping coefficient of transversal waves has been discovered for dilute solutions of PEG 400. This maximum disappears and the damping coefficient decreases monotonically with the concentration of polymers of higher molecular weight in the region of dilute solutions. A fast increase of the damping with concentration has been discovered for semidilute solutions. These experimental data are used for the calculation of the real and imaginary components of the dynamic surface elasticity as a function of concentration and frequency. The obtained dependencies can be explained with the help of a dynamic model of the surface layer of polymer solutions where the main relaxation processes are connected with the monomer exchange between different regions of the surface layer. In the investigated concentration range, the corresponding relaxation time determined from the experimental data changes by more than 2 orders of magnitude.

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