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231223s2008 xx |||||o 00| ||eng c |
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|a 10.1021/la703790f
|2 doi
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|a pubmed24n0597.xml
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|a (NLM)18442224
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|e rakwb
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|a eng
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|a Pu, Gang
|e verfasserin
|4 aut
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|a Characterization of dynamic stick-and-break wetting behavior for various liquids on the surface of a highly viscoelastic polymer
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|c 2008
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 11.06.2008
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|a Date Revised 15.11.2012
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|a published: Print
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|a Citation Status MEDLINE
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|a A thermally stripped acrylic polymer was wet with a series of liquids possessing a broad range of properties. Previously, novel wetting behavior by water was reported for the polymer, which included the formation of a wetting ridge structure substantially larger than those reported elsewhere and the complete halting of the three-phase line. This allows metastable angles ranging from 0 degrees to greater than 150 degrees to be achieved through changes in the sessile drop volume. Greater advancing angles are prevented by the collapse of the drop, producing what has been described as stick-and-break propagation. In Wilhelmy plate experiments for metal plates coated with the polymer, this mechanism produces a quasi-periodic pattern of lines composed of ridge structures. Similar behavior was observed for all liquids tested. Differences were observed in the maximum force measured with a tensiometer (pinning force) and the average distance between ridges for the formed pattern (pinning distance). These quantities are shown to be related to the height of the ridge structures. The kinematic viscosity of the liquids appears to be an important variable for the wetting process. A comparison of pinning quantities at various rates with the master curve of the polymer indicate that its viscoelastic properties govern, to a great extent, the observed rate dependencies; i.e., higher rates produce greater elastic behavior and smaller ridge heights. Also important is the polymer's tendency for creep deformation. The ridge apex is shown to be displaced a significant distance through ridge deformation, which modifies its symmetry
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|a Journal Article
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a Acrylates
|2 NLM
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|a Polymers
|2 NLM
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|a acrylic acid
|2 NLM
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|a J94PBK7X8S
|2 NLM
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|a Severtson, Steven J
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 24(2008), 9 vom: 06. Mai, Seite 4685-92
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|x 1520-5827
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|g volume:24
|g year:2008
|g number:9
|g day:06
|g month:05
|g pages:4685-92
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|u http://dx.doi.org/10.1021/la703790f
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