Chain End Effects and Dewetting in Thin Polymer Films

Henn, G.; Bucknall, David G.; Stamm, Manfred; Vanhoorne, Pierre; Jérôme, Robert

doi:10.1021/ma9500392

Cited by 161 publications

(177 citation statements)

References 18 publications

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“…This phenomenon was shown by Stamm et al for strongly adsorbing end-functional polystyrenes, where annealed films would dewet, but could leave a monolayer of adsorbed end functional polymer on the substrate surface. 48 However, our AFM analysis of the film surfaces reveals only a modest variation in film height, with r.m.s. surface roughness of the order of 10 nm, which is not consistent with dewetting of a film of ~100 nm total thickness.…”

Section: Surface and Interfacial Activity Of Xohdpey In Blended Filmsmentioning

confidence: 70%

Multihydroxyl End Functional Polyethylenes: Synthesis, Bulk and Interfacial Properties of Polymer Surfactants

et al. 2014

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(2014) 'Multihydroxyl end functional polyethylenes : synthesis, bulk and interfacial properties of polymer surfactants. ', Macromolecules., 47 (6). pp. 2062', Macromolecules., 47 (6). pp. -2071 Further information on publisher's website:http://dx.doi.org/10.1021/ma402158bPublisher's copyright statement:This document is the Accepted Manuscript version of a Published Work that appeared in nal form in Macromolecules, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see http://dx.doi.org/10.1021/ma402158bAdditional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. for polar interfaces, are thermally stable up to ~ 250 °C, and to have similar crystallinity and dynamics to their unfunctionalised homopolymers analogues. The polymers segregated strongly to silicon oxide interfaces, with adsorbed layers forming spontaneously at annealed polymer interfaces, having surface excess concentrations approaching 2 R g , and a maximum areal density of approximately 0.6 adsorbed chains per nm 2 . This interfacial activity is achieved almost without detriment to the bulk physical properties of the polymer as evidenced by thermal analysis, quasi-elastic neutron scattering and smallangle neutron scattering (SANS). SANS experiments show little evidence for aggregation of the dihydroxyl functionalized polymers in blends with PE homopolymers, which is thought to explain why these additives have particularly strong interfacial adsorption, even at relatively high concentrations. A modest level of segregation of the additives to exposed blend surfaces was also seen, particularly when the additive molecular weight was significantly lower than that of the matrix. We attribute this to a combination of the relatively low molecular weight of the additives and the marginally lower surface energy associated with deuterated polymers.3

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Section: Surface and Interfacial Activity Of Xohdpey In Blended Filmsmentioning

confidence: 70%

Multihydroxyl End Functional Polyethylenes: Synthesis, Bulk and Interfacial Properties of Polymer Surfactants

et al. 2014

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“…Once the MPS is completed, the force balance between the Laplace and intermolecular contributions makes the system very stable, thus leading to the flat structure under the channel. While there has been no result reported on the formation of ultrathin liquid films that are stable, there have been several studies reported for the stability of thin polymer films, involving the use of grafting [20][21][22] and nanoparticles. 23 However, the film thickness is on the order of 100 nm, whereas the thickness of the stable film in this study is on the order of 1 nm.…”

Section: ͑4͒mentioning

confidence: 99%

Ultrathin liquid films under alternating intermolecular potential fields and capillary force

Suh

Lee

2002

The Journal of Chemical Physics

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A unique experimental system is devised that reveals the interplay among capillary force and alternating intermolecular forces. As a consequence of the interplay, untrathin ͑Ͻ10 nm͒ liquid films, which invariably experience dewetting, can be made stable, leading to a smooth and dropless minimum-potential surface. Theory and experiment show that the film thickness is Ͻ1 nm when the film recedes in spite of the capillarity and it is Ͻ3 nm when it rises into a cavity.

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“…Many researches have been investigated how to retard dewetting action of polymer thin films, for example, modification of polymeric structure and/or substrate surface (Henn et al, 1996;Choi and Zhang, 2006) addition of polymer additive (Carroll et al, 2006;Akhrass et al, 2008), and addition of nanoparticles (Barnes et al, 2000;Barnes et al, 2001). …”

Section: Introductionmentioning

confidence: 99%

Thermal stability of zinc oxide - polystyrene composite thin film

Wongtrakul¹,

Watchana²,

Pangpaiboon³

2017

j.appsci

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Thin polymer films need to be stable on solid substrates while processing application to preserve their properties. Increasing temperature causes polymer thin films lost their stability. From classical knowledge, the existence of impurity in polymer thin film usually induces dewetting behavior. However, addition of small amount of nano-fillers enhanced thermal stability of polymer thin film. In this research, thermal stability of composite film was investigated by adding zinc oxide nanoparticle into polystyrene thin film. The concentrations of zinc oxide nanoparticles were 0, 0.1, 0.2, 0.5 and 1.0 wt% in polystyrene (MW = 35,000 g/mol). After annealing the composite films at 90 °C for various times, the film morphology was studied by using optical microscope. Contact angle and surface energy of films were calculated by using contact angle measurement. Dewetting area was observed and considered to compare the percentages of each samples. From these results, we found that addition of zinc oxide nanoparticles can retard dewetting behavior of polystyrene film and increasing amount of nanoparticles increases thermal stability of composite films. Keywords: dewetting, nanoparticles, thin film IntroductionPolymer thin film is a famous material used in various technological applications such as dielectric coatings, optical coatings, lithography resisting, electronic packaging, and surfaces lubricating because of a remarkable insulation property of polymer. The thin film need to be stable on the substrate in technology application. However, because of the difference of chemical structure between polymer film and metal oxide substrate, polymer film trend to separate from the substrate which is called dewetting behavior. The first step of dewetting process, early stage, occurs when small holes are created. Subsequently, the small holes are expanded and merged which each others showing ribbon structure, intermediated state. Finally, ribbon structure is disconnected and the film presents a number of droplets which is called completely dewet.Many researches have been investigated how to retard dewetting action of polymer thin films, for example, modification of polymeric structure and/or substrate surface (Henn et al

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Chain End Effects and Dewetting in Thin Polymer Films

Cited by 161 publications

References 18 publications

Multihydroxyl End Functional Polyethylenes: Synthesis, Bulk and Interfacial Properties of Polymer Surfactants

Multihydroxyl End Functional Polyethylenes: Synthesis, Bulk and Interfacial Properties of Polymer Surfactants

Ultrathin liquid films under alternating intermolecular potential fields and capillary force

Thermal stability of zinc oxide - polystyrene composite thin film

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