Surface modification of low density polyethylene in a fluorine gas plasma

Surface Infrared Spectroscopy

“…The influence of various gases on the surface modification of polyethylene has also been investigated by Blythe and coworkers. (71) An interesting study on the surface structure of low-density polyethylene after fluorination during glow discharge was reported by Anand et al (72) The investigators found that the degree of crystallinity of the polyethylene was altered depending on whether the sample was placed within an aluminum cage or not during exposure. Doughty and Pantelis(73) studied the surface effects of poly( vinylidene fluoride) with glow discharge to support a mechanism of dipole orientation as the origin of the piezoelectric properties of the polymer.…”

Haloform plasma modification of polyolefin surfaces

“…The fluorination of polymer surfaces using the CF 4 plasma is wellknown [29][30][31][32][33][34]. The yield in polyolefin fluorination ranges from 200 [30] to 80 [34] F per 100 C atoms using the CF 4 plasma.…”

Surface Modification of Silicone Rubber by CF4 Radio Frequency Plasma Immersion

“…Figure 5 shows that the F content increases monotonously and plateaus off with treatment time from 2 to 20 min. The increase of fluorine observed in the XPS spectra is attributed to introducing the fluoric groups onto the SIR surface, and the rule of F content variation is fitted to the opinion that the CF 4 plasma fluorination and ablation or etching occurring on the polymer surface are parallel and competitive, and the competition between fluorination and ablation or etching depends on RF power and treatment time [1,28]. Under the constant RF power of 200 W, fluorination predominates over ablation or etching initially, leading to the fluorine content increasing rapidly, but beyond a critical treatment time, the two reactions reach a dynamic near-equilibrium with slowly varying F content on the surface.…”