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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1021/la300119n
|2 doi
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|a pubmed24n0718.xml
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|a DE-627
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|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Zuo, Biao
|e verfasserin
|4 aut
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|a Stick-slip phenomenon in measurements of dynamic contact angles and surface viscoelasticity of poly(styrene-b-isoprene-b-styrene) triblock copolymers
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|c 2012
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 29.06.2012
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|a Date Revised 21.11.2013
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a In this paper, a series of poly(styrene-b-isoprene-b-styrene) triblock copolymers (SIS), with different chemical components, was synthesized by anionic polymerization. The relationships between surface structures of these block copolymers and their stick-slip phenomena were investigated. There is a transition from stick-slip to a closely smooth motion for the SIS films with increasing PS content; the patterns almost vanish and the three-phase line appears to move overall smoothly on the film surface. The results show that the observed stick-slip pattern is strongly dependent on surface viscoelasticity. The jumping angle Δθ, which is defined as θ(1) - θ(2) (when a higher limit to θ(1) is obtained, the triple line "jumps" from θ(1) to θ(2) with increases in drop volume), was employed to scale the stick-slip behavior on various SIS film surfaces. Scanning force microscopy/atomic force microscopy (AFM) and sum frequency generation methods were used to investigate the surface structures of the films and the contributions of various possible factors to the observed stick-slip behavior. It was found that there is a linear relationship between jumping angle Δθ and the slope of the approach curve obtained from AFM force measurement. This means that the stick-slip behavior may be attributed mainly to surface viscoelasticity for SIS block copolymers. The measurement of jumping angle Δθ may be a valuable method for studying surface structure relaxation of polymer films
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Butadienes
|2 NLM
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|a Hemiterpenes
|2 NLM
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|a Pentanes
|2 NLM
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|a Polymers
|2 NLM
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|a isoprene
|2 NLM
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|a 0A62964IBU
|2 NLM
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|a Styrene
|2 NLM
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|a 44LJ2U959V
|2 NLM
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| 700 |
1 |
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|a Zheng, Fan Fan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhao, Yu Rong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chen, TianYu
|e verfasserin
|4 aut
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| 700 |
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|a Yan, Zhuo Hua
|e verfasserin
|4 aut
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| 700 |
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|a Ni, Huagang
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Xinping
|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 28(2012), 9 vom: 06. März, Seite 4283-92
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|x 1520-5827
|7 nnns
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|g volume:28
|g year:2012
|g number:9
|g day:06
|g month:03
|g pages:4283-92
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|u http://dx.doi.org/10.1021/la300119n
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