Aging of air-corona-treated polypropylene film

Strobel, Joan M.; Strobel, Mark; Lyons, Christopher S.; Dunatov, Christopher; Perron, Steven J.

doi:10.1163/156856191x00080

Cited by 85 publications

(41 citation statements)

References 12 publications

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“…5,30 Strobel et al 31 have reported that the LMWOM on the corona-treated polypropylene arises from the random cleavage of the polymer chain into a series of oligomers containing oxidized groups such as COOH, CHO or CH 2 OH. Such hydrophilic species can be dissolved into water.…”

Section: Resultsmentioning

confidence: 99%

Wettability characteristics of poly(ethylene terephthalate) films treated by atmospheric pressure plasma and ultraviolet excimer light

Gotoh

Yasukawa

Kobayashi

2011

Polym J

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Two dry processes, atmospheric pressure plasma (APP) exposure and 172 nm ultraviolet (UV) excimer light irradiation, were carried out to enhance the hydrophilic nature of poly(ethylene terephthalate) (PET) film. The wettability change in the PET film surface after the processes were carried out was recorded by the wetting force measurements employing the Wilhelmy method. After the dry processes, drastic decreases in the advancing and receding contact angles of water were observed, especially for the APP exposure. The advancing angle on the treated PET surface was found to increase by rinsing with water or aging in air, whereas the receding one remained almost the same. The hydrophobic recovery diminished more rapidly for the UV-treated film. Surface characterizations of the PET film were performed. We discuss the influence of the dry processes on the physicochemical properties of the PET surface.

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Section: Resultsmentioning

confidence: 99%

Wettability characteristics of poly(ethylene terephthalate) films treated by atmospheric pressure plasma and ultraviolet excimer light

Gotoh

Yasukawa

Kobayashi

2011

Polym J

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“…Non-equilibrium atmospheric pressure plasmas [1][2][3][4] have attracted considerable attention because they require low capital cost, can be easily implemented in a continuous production line and also due to their ability to generate highly reactive chemical species at ambient gas temperature [5]. Plasma jets, or plasma plumes are a kind of atmospheric pressure gas discharges where the plasma (usually obtained from a noble gas) is extended beyond the plasma generation region into the surrounding ambience [4,6,7].…”

Section: Introductionmentioning

confidence: 99%

Surface modification of polymeric materials by cold atmospheric plasma jet

Kostov

Nishime

Castro

et al. 2014

Applied Surface Science

219

144

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In this work we report the surface modification of different engineering polymers, such as, polyethylene terephthalate (PET), polyethylene (PE) and polypropylene (PP) by an atmospheric pressure plasma jet (APPJ). It was operated with Ar gas using 10 kV, 37 kHz, sine wave as an excitation source. The aim of this study is to determine the optimal treatment conditions and also to compare the polymer surface modification induced by plasma jet with the one obtained by another atmospheric pressure plasma sourcethe dielectric barrier discharge (DBD). The samples were exposed to the plasma jet effluent using a scanning procedure, which allowed achieving a uniform surface modification. The wettability assessments of all polymers reveal that the treatment leads to reduction of more than 40• in the water contact angle (WCA). Changes in surface composition and chemical bonding were analyzed by x-ray photoelectron spectroscopy (XPS) and Fourier-Transformed Infrared spectroscopy (FTIR) that both detected incorporation of oxygen-related functional groups. Surface morphology of polymer samples was investigated by Atomic Force Microscopy (AFM) and an increase of polymer roughness after the APPJ treatment was found.The plasma-treated polymers exhibited hydrophobic recovery expressed in reduction of the O-content of the surface upon rinsing with water. This process was caused by the dissolution of low molecular weight oxidized materials (LMWOMs) formed on the surface as a result of the plasma exposure.

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“…However, it has been demonstrated that, during flame treatment, the concentration of O is very low relative to the concentration of OH and the other active species, which explains the lack of LMWOM [37]. This, in turn, is the main reason why flame-treated PP is more stable than corona-treated PP as a function of storage time under ambient conditions [19,22,39].…”

Section: Results and Discussion 31 Morphologymentioning

confidence: 99%

Mapping physicochemical surface modifications of flame-treated polypropylene

Farris¹,

Pozzoli²,

Vecchia³

et al. 2014

Express Polym. Lett.

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Abstract. The aim of this work was to investigate how the surface morphology of polypropylene (PP) is influenced by the surface activation mediated by a flame obtained using a mixture of air and propane under fuel-lean (equivalence ratio ! = 0.98) conditions. Morphological changes observed on flamed samples with smooth (S), medium (M), and high (H) degree of surface roughness were attributed to the combined effect of a chemical mechanism (agglomeration and ordering of partially oxidized intermediate-molecular-weight material) with a physical mechanism (flattening of the original roughness by the flame's high temperature). After two treatments, the different behavior of the samples in terms of wettability was totally reset, which made an impressive surface energy of ~43 mJ·m -2 possible, which is typical of more hydrophilic polymers (e.g., polyethylene terephthalate -PET). In particular, the polar component was increased from 1.21, 0.08, and 0.32 mJ·m -2 (untreated samples) to 10.95, 11.20, and 11.17 mJ·m -2 for the flamed samples S, M, and H, respectively, an increase attributed to the insertion of polar functional groups (hydroxyl and carbonyl) on the C-C backbone, as demonstrated by the X-ray photoelectron spectroscopy results.

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Aging of air-corona-treated polypropylene film

Cited by 85 publications

References 12 publications

Wettability characteristics of poly(ethylene terephthalate) films treated by atmospheric pressure plasma and ultraviolet excimer light

Wettability characteristics of poly(ethylene terephthalate) films treated by atmospheric pressure plasma and ultraviolet excimer light

Surface modification of polymeric materials by cold atmospheric plasma jet

Mapping physicochemical surface modifications of flame-treated polypropylene

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