Polymer Surface Dynamics

Andrade, Joseph D.; Gregonis, D. E.; Smith, Lee M.

doi:10.1007/978-1-4684-8610-0_2

Cited by 85 publications

(77 citation statements)

References 29 publications

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“…The numerical The methods used here can be adapted to treat other problems in which a liquid drop affects the wetting properties of the surface on which it moves. For example, a solvent drop on a polymer surface may solvate or swell the surface [3], and in metallurgy a solder drop on a metal substrate or a molten metal drop on a ceramic substrate may react with the substrate (see, for example, [5,10]). More generally, the level-set approach should be useful in a wide variety of problems involving drop motion, which are often analyzed in a onedimensional approximation because of the analytical difficulties in treating the geometry of a two-dimensional wetted region.…”

Section: Introductionmentioning

confidence: 99%

Reactive Autophobic Spreading of Drops

Hunter

Zhao

2002

Journal of Computational Physics

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Section: Introductionmentioning

confidence: 99%

Reactive Autophobic Spreading of Drops

Hunter

Zhao

2002

Journal of Computational Physics

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“…The low molecular weight polycarbonate PTMC, Figure 1a, was synthesized by ring-opening polymerization of tri(methylene carbonate), initiated from 1,4-butanediol. The degree of polymerization (DP) was 40 (n ) 20 on each side), as obtained by 1 H NMR endgroup analysis, giving a molecular weight of approximately 4000 g/mol. 22 The ionomer, Figure 1b, was subsequently prepared by functionalizing both ends of the PTMC polymer with the zwitterionic PC group.…”

Section: Methodsmentioning

confidence: 99%

Environment-Induced Surface Dynamics of a Biomimetic Ionomer Studied Using in Situ Second Harmonic Generation

et al. 2008

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The environmental-induced surface dynamics of the biomimetic phosphoryl choline (PC)-functionalized poly(trimethylene carbonate) ionomer has been studied and compared to its unfunctionalized counterpart using in situ second harmonic generation measurements. Whereas the nonpolar liquid n-hexane did not induce any surface dynamic processes in the ionomer under study, the presence of water initiated a Debye-type dynamic reaction at the surface of the PC ionomer, which had no equivalent in the unfunctionalized material. This first-order reaction was attributed to a surface enrichment process of the functionalized ionomer in the hydrophilic environment involving movement of the PC endgroups from aggregates in the bulk to the surface. The time constant of the process was found to be about 6 min, and the corresponding activation energy was 0.4 eV. The dehydration process of the PC-functionalized ionomer in nitrogen gas atmosphere could be described by two time constants, one slightly below 1 min and the other one just above 13 min. The results presented in this work show that SHG measurements are well suited for the study of polymer surface restructuring dynamics in response to environmental changes. Such information is very important for the successful design and implementation of biomimetic polymers intended for biomedical applications.

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“…For example, the modified hydrophobicity of PET may alter with time when in contact with water. 2,5,6,10,11 This is because, unlike inorganic materials, polymer surfaces contain many flexible segments and groups that may respond to the changing environment. It is thus important to investigate the surface dynamic behaviour before any surface treatment of polymers for real applications.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the surface structures and dynamics of polyethylene terephthalate (PET) modified by fluorocarbon plasmas

Zhang

Chin

Huang

et al. 1999

Surf. Interface Anal.

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Polyethylene terephthalate (PET) surfaces were treated with CH4/CF4 plasmas and the surface structures as well as the dynamic behaviour of the modified surfaces after water immersion were studied using angle‐dependent x‐ray photoelectron spectroscopy (XPS). It was found that the fluorocarbon plasma treatment resulted in the formation of some fluorine‐containing groups, which improve the surface hydrophobicity of the PET films. The extent of surface modification is dependent on the molar ratio of the CH4/CF4 feed gases used in the plasma. The hydrophobicity of the modified PET films decreased after they were immersed in water, partly as a result of the ‘turnover’ or movement of the fluorine‐containing groups from the surface to the bulk. From XPS analysis, it was found that the movement of the fluorine‐containing groups depends on the modified surface structures. The turnover rates can be described by a decay constant k of surface dynamics; the larger the k value, the faster the movement of the fluorine‐containing groups. Experiments showed that the degree of surface modification is higher and is maintained for a longer period for CH4/CF4 mixed plasmas as compared to that treated by pure CF4 plasma. The effect of the molar ratio of CH4/CF4 feed gases and its relationship with the movement of the fluorine‐containing surface groups were discussed. Copyright © 1999 John Wiley & Sons, Ltd.

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Polymer Surface Dynamics

Cited by 85 publications

References 29 publications

Reactive Autophobic Spreading of Drops

Reactive Autophobic Spreading of Drops

Environment-Induced Surface Dynamics of a Biomimetic Ionomer Studied Using in Situ Second Harmonic Generation

Investigation of the surface structures and dynamics of polyethylene terephthalate (PET) modified by fluorocarbon plasmas

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