Fluoropolymer surface studies

Dwight, D. W.; Riggs, William M.

doi:10.1016/0021-9797(74)90242-2

Cited by 150 publications

(47 citation statements)

References 9 publications

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“…The surface treatment of PTFE with sodium naphthalenide for 30 s reduced the F/C ratio in the surface from 2 to 0.17, and introduced substantial quantities of oxygen (O/C ratio ϭ 0.2). 6 Dwight et al 7 treated the fluorinated ethylene-propylene copolymer (FEP) with sodium in liquid ammonia. Complete defluorination took place, and large quantities of oxygen were introduced into the surface, including carbonyl and carboxylic acid groups.…”

Section: Introductionmentioning

confidence: 99%

Surface modification of poly(tetrafluoroethylene) film by chemical etching, plasma, and ion beam treatments

Kim¹

2000

J. Appl. Polym. Sci.

113

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Section: Introductionmentioning

confidence: 99%

Surface modification of poly(tetrafluoroethylene) film by chemical etching, plasma, and ion beam treatments

Kim¹

2000

J. Appl. Polym. Sci.

113

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“…Ion energy is an important parameter, which is responsible for the induction of the chemical reaction and the surface heating effect, which could lead to deterioration of the polymer surface. It was also found that the higher ion energy increases the roughness of the polymer surface, which affects the contact angle measurements [10,11]. It is found that there is no appreciable change in the ion density and in the plasma potential when the plasma gas is changed from Argon to oxygen An optimum combination of ion energy and ion density will favor the chemical activation on the surface of the polymer rather increasing the surface roughness or deteriorating the surface/ bulk properties of the polymer.…”

Section: Langmuir Probe Analysismentioning

confidence: 99%

Plasma surface modification of polystyrene and polyethylene

Guruvenket

Rao

Komath

et al. 2004

Applied Surface Science

311

215

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Polystyrene (PS) and polyethylene (PE) samples were treated with argon and oxygen plasmas. Microwave Electron Cyclotron Resonance (ECR) was used to generate the argon and oxygen plasmas and these plasmas were used to modify the surface of the polymers. The samples were processed at different microwave powers and treatment time and the surface modification of the polymer was evaluated by measuring the water contact angle of the samples before and after the modification. Decrease in the contact angle was observed with the increase in the microwave power for both polystyrene and polyethylene. Plasma parameters were assessed using Langmuir probe measurements.Fourier transform infrared spectroscopy showed the evidence for the induction of oxygen based functional groups in both polyethylene and polystyrene when treated with the oxygen plasma. Argon treatment of the polymers showed improvement in the wettability which is attributed to the process called as CASING, on the other hand the oxygen plasma treatment of the polymers showed surface functionalization. Correlation between the plasma parameters and the surface modification of the polymer is also discussed * Corresponding author: gmrao@isu.iisc.ernet.in

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“…Heating of an etched surface is known to lead to an increase in surface F as indicated by XPS and a corresponding loss of adhesion strength. 2 We have shown that heating leads to a loss of surface area, and suggested that this reflects a surface melting process in which the increase in F results from mixing of defluorinated surface species with more highly fluorinated material from deeper in the modified r e g i~n .~…”

Section: Discussionmentioning

confidence: 98%

Photolithography of polytetrafluoroethylene for adhesion

Rye

Martinez

1989

J of Applied Polymer Sci

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SynopsisIrradiation of polytetrafluoroethylene (PTFE) with Mg(Ka) X-rays is shown to protect the surface against the chemical etching steps used to prepare PTFE for adhesion. Reirradiated etched samples of PTFE have adhesion strengths to epoxies of less than 3% of that for nonirradiated etched samples. The major portion of this decrease in adhesion strength occurs for X-ray exposures of less than 10 min and failure @ every case occurs in PTF' E and not in the bonded transition region. XPS measurements (20 A sampling depth) show little difference in F content between irradiated and nonirradiated samples, but thermal desorption shows increasing short chain fluorocarbon desorption with irradiation time. These results are consistent with previous studies showing that irradiation produces free radicals that lead to branching and/or crosslinking, and a surfac: rich in low molecular weight fluorocarbons. The crosslinked surface is resistant to deep (l0,OOO A) chemical attack and rich in short chain fluorocarbons; both effects are expected to lead to weak a d h d v e bonding.

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Fluoropolymer surface studies

Cited by 150 publications

References 9 publications

Surface modification of poly(tetrafluoroethylene) film by chemical etching, plasma, and ion beam treatments

Surface modification of poly(tetrafluoroethylene) film by chemical etching, plasma, and ion beam treatments

Plasma surface modification of polystyrene and polyethylene

Photolithography of polytetrafluoroethylene for adhesion

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