Influences of chain heterogeneity on instability of polymeric thin films: Dewetting of polystyrenes, polychloromethylstyrenes and its copolymers

Traiphol, Rakchart

doi:10.1016/j.jcis.2007.01.027

Cited by 16 publications

(9 citation statements)

References 42 publications

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“…All films are annealed at the same time in a vacuum oven to minimize experimental errors. The annealing of pure PS11K thin films at 120°C, which is above its glass transition temperature (T g ), 11 for 12 h induces the formation of small holes as shown in Fig. 2.…”

Section: Resultsmentioning

confidence: 99%

“…The M n and M w /M n were provided by the supplier, while the T g was measured by differential scanning calorimetry (DSC) technique. 11 Solutions of mixed PS and TA-PS were prepared in toluene (AR grade). The concentrations of TA-PS were 0, 2, 5, 10, 20, and 40 wt%.…”

Section: Methodsmentioning

confidence: 99%

“…By modifying the interfacial tension between film and substrate, the stability of polymeric thin film is improved. [8][9][10][11][12][13][14][15][16][17][18][19][20] For example, the substrate surface is modified by chemical compositions with high affinity to the polymer film. 10 Thus, the interfacial tension between film and substrate is attuned, which improves the stability of polymeric thin film.…”

Section: Introductionmentioning

confidence: 99%

“…Functionalized polymers with adherent groups can segregate to the solid substrate. [11][12][13][14][15][16]18,19,21 Therefore, the addition of functionalized polymers such as sulfonated polystyrene with a sulfonation level of 0.76-6.5 mol% or poly(styrene-stat-chloromethylstyrene) with 5 mol% of chloromethylstyrene group into polystyrene (PS) thin film can enhance interfacial interactions, which in turn retard the dewetting process. 12,13,15,16 A fascinating strategy to suppress the dewetting of polymeric thin films is also presented by Barnes et al 22 The addition of small amounts of fullerene nanoparticles into PS and polybutadiene thin films results in significant enhancement of their stability.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing the stability of polystyrene ultrathin films by using star-shape polymers as dewetting inhibitors

Pangpaiboon

Traiphol

2015

J Coat Technol Res

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This contribution introduces a new class of materials for improving the stability of polystyrene (PS) ultrathin films. Two types of three-arm polystyrenes (TA-PS) with different arm lengths are added into PS thin films with thicknesses of 7 and 23 nm. Concentration of the TA-PS additives is varied from 0 to 40 wt%. The morphological change of PS films upon annealing above its glass transition temperature is followed by utilizing optical and atomic force microscopy. Our results show that the addition of TA-PS into PS films leads to significant improvement of the film stability. The dewetting rate of PS film containing only 5 wt% of TA-PS is 3 times slower than that of the pure PS film. The increase of TA-PS concentration results in systematic decrease of the dewetting rate. We also observe that the dewettingsuppression efficiency of the TA-PS depends significantly on its arm length.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhancing the stability of polystyrene ultrathin films by using star-shape polymers as dewetting inhibitors

Pangpaiboon

Traiphol

2015

J Coat Technol Res

Self Cite

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“…Only polymer 8 shows somewhat lower T g than polymers 9 and 10, which is caused by the lack of cyclic substituents in imidazolidine ring. It should be added that studied polymers 8-10 are characterized by much higher T g than PS (93-110°C) or chloromethylated PS (7) (76-77°C) [31,32].…”

Section: Glass Temperature Of Polymers (8-10)mentioning

confidence: 99%

Thermal properties of novel polymers based on poly(hydantoin-methyl-p-styrene) and their substrates

Kaczmarek

Chylińska

Ziegler-Borowska

2011

J Therm Anal Calorim

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The following compounds have been synthesized: (a) hydantoins 5,5-dimethylimidazolidine-2,4-dione (1), 1 (6), (two of them are unknown: 5 and 6); (c) macromolecular compounds: poly(chloromethyl-p-styrene) (7), used as reference, and three polymers (two of them are novel) obtained by substitution of hydantoins 1-3 to poly(methyl-p-styrene) (8-10). Their thermal properties have been studied by thermogravimetry. It was found that the chemical structure, tautomerization, and intermolecular interaction influence the thermal stability of substrates. The presence of phenyl rings causes the increase of resistance of studied hydantoins. The obtained polymers are characterized by significantly improved thermal stability comparing to poly (chloromethyl-p-styrene). The mechanism of thermal degradation of investigated polymers and explanation of their thermal resistance has been proposed. The relatively high temperatures of glass transition of polymers have been determined by DSC.

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Dewetting Behavior of Random Copolymer Films Induced by Solvent Vapor Annealing

Zhang

Wen

2022

ChemPhysChem

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In recent years, the dewetting behavior of block copolymer films has been studied a lot, but that of random copolymer films was rarely studied. In this study, effects of film thickness and solvent vapor annealing duration (0 s-24 h) on the dewetting behavior of the spin-coated poly(styrene-co-acrylonitrile) (SAN) random copolymer films were mainly investigated by atomic force microscopy and contact angle method for the first time. The film thicknesses of the SAN films prepared at different concentrations were characterized by X-ray reflectometry to be 6-34 nm. With the annealing of acetone vapor, the SAN films first appear holes and then rupture into droplets which fuse and break periodically. The periodic evolutions of the droplets are due to the preferred affinity of acetone molecules with the AN segments and the change of surface energy. This phenomenon is different from the single evolutions in the spin-coated polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) block copolymer films. This illustrates the interactions between AN segments and the substrate are stronger than those between PMMA segments and the substrate in the spin-coated films.

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Influences of chain heterogeneity on instability of polymeric thin films: Dewetting of polystyrenes, polychloromethylstyrenes and its copolymers

Cited by 16 publications

References 42 publications

Enhancing the stability of polystyrene ultrathin films by using star-shape polymers as dewetting inhibitors

Enhancing the stability of polystyrene ultrathin films by using star-shape polymers as dewetting inhibitors

Thermal properties of novel polymers based on poly(hydantoin-methyl-p-styrene) and their substrates

Dewetting Behavior of Random Copolymer Films Induced by Solvent Vapor Annealing

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