Influence of gas and treatment time on the surface modification of EPDM rubber treated at afterglow microwave plasmas

Maia, Joaquim; Pereira, F. P.; Dutra, Jorge Carlos Narciso; Mello, S. A. C.; Becerra, Emmanuel; Massi, M.; Sobrinho, Argemiro Soares da Silva

doi:10.1016/j.apsusc.2013.09.013

Cited by 28 publications

(16 citation statements)

References 24 publications

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“…Thus, it would be expected that the adhesion force should steadily increase with increasing plasma treatment time. However, it has already been reported several times that after some time of plasma treatment, the peel strength of the adhesive-bonded joints formed with the polymers begins to decrease during further processing [9,[12][13][14][15]. Besides, it was also observed that for longer treatment time, after the reduction of the peel strength, its re-increase occurred [13].…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Plasma Modification of Styrene–Butadiene Block Copolymer Surfaces for Improved Adhesion—A Kinetic Approach

et al. 2020

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This paper proposed a kinetic model that can describe the changes in the adhesion properties of styrene–butadiene (SBS) block copolymer surfaces under the influence of low-temperature plasma treatment. As a measure of these changes, the peel strength of joints formed between the copolymer surface and the polyurethane adhesive was chosen. Five types of low-temperature low-pressure RF plasma, two inert plasmas (Ar and He), and three reactive plasmas (O2, CO2, and CCl4) were tested. It was found that for all these types of plasma, the peel strength with the plasma treatment time first increases rapidly reaching a maximum value, and then there is a visible decrease in peel strength, after which the peel strength increases again. This dependence of the peel strength on the plasma treatment time is very well described by the proposed model, which considers three processes: (1) the generation of radical states followed by the creation of functional groups involved in the adhesive bonding process, (2) the surface cross-linking that decreases the concentration of these functional groups, and (3) the formation of nano-roughness. The model analysis revealed differences between the action of reactive and inert plasmas in the SBS surface cross-linking mechanism and preferential etching process, as well as differences in the generation of radical states between the O2 plasma (electron process) and other plasmas tested (ionic processes).

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Section: Introductionmentioning

confidence: 99%

Low-Temperature Plasma Modification of Styrene–Butadiene Block Copolymer Surfaces for Improved Adhesion—A Kinetic Approach

et al. 2020

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“…The contact angle measurements revealed that the treatment effect of Ar plasma treatment was better than oxygen and air under same processing time and power, indicating that the NBR5080 after Ar plasma treatment became more hydrophilic than that treated by oxygen and air. Because Ar is inert gas, a large amount of energy transmitted when NBR5080 is bombarded by Ar + ion, and therefore the free radicals are generated on NBR5080 surface and the increasing of surface roughness and oxygen‐containing polar groups on NBR5080 samples through the Ar plasma treatment . Although both oxygen and air are reactive gas, they can react with BNR5080 surface and reduce the etching effect.…”

Section: Resultsmentioning

confidence: 99%

“…Different gases such as Ar, oxygen, air, and nitrogen or their mixtures can be used in plasma treatment . It is possible to create different effects on physical and chemical properties of materials' surfaces by usage different gases …”

Section: Introductionmentioning

confidence: 99%

Effect of cold plasma process on the surface wettability of NBR and the kerosene resistance of NBR/PTFE composites

Qin

Meng

Yun-ping³

2017

Surf Interface Anal

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In this study, first the acrylonitrile-butadiene rubber (NBR5080) was modified by argon (Ar), air, and oxygen plasma at low temperature, and the effect of plasma process (power, time, and pressure) on the surface properties of NBR5080, the interfacial properties, physical properties, and the mechanical properties of NBR5080/polytetrafluoroethylene (PTFE) composites were investigated. The state contact angle and the surface free energy were applied to characterize the surface wettability of NBR5080. The scanning electron microscope and the atomic force microscope were used to observe the surface morphology of the NBR5080. The chemical changes on the NBR5080 surface were verified by X-ray photoelectron spectroscopy. The average water contact angle the NBR5080 declined obviously when NBR5080 was treated by Ar (100 W/600 s/30 Pa). The active oxygen groups were introduced onto the surface of NBR5080 by cold plasma treatment and more active group containing oxygen were observed on the samples treated by Ar plasma. The peel strength between the NBR5080 and the PTFE was increased obviously, which increased from 0 to 44.2 N•m −1 for Ar plasma treatment. The mass and the dimension of NBR5080 increase sharply after immersing in kerosene, whereas the NBR5080/PTFE composites changed a little. The mechanical properties of NBR5080 and NBR5080/PTFE composites decreased as the immersion time in kerosene increased, but the decreased degree of NBR5080 is higher than NBR5080/PTFE composites.

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“…Many studies have emphasized the poor adhesion properties of SBR (and of elastomers in general) and have tried to improve them, a task that is sometimes extremely difficult to achieve . To address this issue, a large range of techniques has been scanned to modify the surface of elastomeric materials: mechanical roughening, solvent wiping, chemical treatments, halogenation, UV treatments and non‐thermal plasma, including low pressure plasma treatments and atmospheric pressure plasma treatments …”

Section: Introductionmentioning

confidence: 99%

Influence of Plasma Chamber Set‐Up on the Surface Modification of Non‐Vulcanized and Pure SBR Rubber Treated at Radio‐Frequencies Air Plasma

Henry

Vallat

Noël

et al. 2015

Plasma Processes & Polymers

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International audienceNon-vulcanized styrene-butadiene rubber thin films were exposed to Radio-Frequency low-pressure air plasma. Two different configurations corresponding to direct and downstream RF plasmas were compared. Optical emission spectroscopy provided information about plasma composition and temperature. The plasma treated SBR surfaces were characterized by contact angles and XPS spectroscopy. Two different phenomenological mechanisms are proposed to describe the observed differences according to the plasma configuration used and account for the impact of the activated gas phase on the structure of plasma-treated non-vulcanized SBR surfac

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Influence of gas and treatment time on the surface modification of EPDM rubber treated at afterglow microwave plasmas

Cited by 28 publications

References 24 publications

Low-Temperature Plasma Modification of Styrene–Butadiene Block Copolymer Surfaces for Improved Adhesion—A Kinetic Approach

Low-Temperature Plasma Modification of Styrene–Butadiene Block Copolymer Surfaces for Improved Adhesion—A Kinetic Approach

Effect of cold plasma process on the surface wettability of NBR and the kerosene resistance of NBR/PTFE composites

Influence of Plasma Chamber Set‐Up on the Surface Modification of Non‐Vulcanized and Pure SBR Rubber Treated at Radio‐Frequencies Air Plasma

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