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Electrocapillary wave studies of different poly(dimethyl siloxane)s

Electrocapillary wave studies of different poly(dimethyl siloxane)s The monolayer behavior of different end‐functionalized poly(dimethyl siloxane)s (PDMSs) and a block copolymer, poly(dimethyl siloxane‐co‐ethylene oxide) (PDMS‐co‐EO) spread on an oligomeric poly(ethylene glycol) (PEG) substrates, were studied by means of electrocapillary wave diffraction (ECWD). Over a relatively small temperature range (40–70°C), the damping constant was more dependent on temperature than on the wave vector. Different surface layer properties were observed for two PDMS: one terminated with a methyl group (PDMS‐CH3) and the one terminated with a hydroxy group (PDMS‐OH). PDMS‐OH showed a larger reduction in surface tension compared to PDMS‐CH3 because of a higher interfacial affinity with PEG, which indicated that its monolayer surface activity was weaker. A lower surface elasticity of PDMS‐OH than that of PDMS‐CH3 supported that conclusion. The block copolymer showed no surface activity, since the short siloxane moiety did not repel the strong interaction between PEG and the ethylene oxide. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Polymer Engineering & Science Wiley

Electrocapillary wave studies of different poly(dimethyl siloxane)s

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References (23)

Publisher
Wiley
Copyright
Copyright © 1998 Society of Plastics Engineers
ISSN
0032-3888
eISSN
1548-2634
DOI
10.1002/pen.10239
Publisher site
See Article on Publisher Site

Abstract

The monolayer behavior of different end‐functionalized poly(dimethyl siloxane)s (PDMSs) and a block copolymer, poly(dimethyl siloxane‐co‐ethylene oxide) (PDMS‐co‐EO) spread on an oligomeric poly(ethylene glycol) (PEG) substrates, were studied by means of electrocapillary wave diffraction (ECWD). Over a relatively small temperature range (40–70°C), the damping constant was more dependent on temperature than on the wave vector. Different surface layer properties were observed for two PDMS: one terminated with a methyl group (PDMS‐CH3) and the one terminated with a hydroxy group (PDMS‐OH). PDMS‐OH showed a larger reduction in surface tension compared to PDMS‐CH3 because of a higher interfacial affinity with PEG, which indicated that its monolayer surface activity was weaker. A lower surface elasticity of PDMS‐OH than that of PDMS‐CH3 supported that conclusion. The block copolymer showed no surface activity, since the short siloxane moiety did not repel the strong interaction between PEG and the ethylene oxide.

Journal

Polymer Engineering & ScienceWiley

Published: May 1, 1998

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