Industrial processing of polymers by low-pressure plasmas: the role of VUV radiation

Wertheimer, M. R.; Fozza, A. C.; Holländer, Andreas

doi:10.1016/s0168-583x(99)00073-7

Cited by 213 publications

(161 citation statements)

References 42 publications

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“…It is known 17,21,22 that to generate degradation with oxygen it is necessary to create radicals from SA molecules, and it would take some time to create volatile compounds from the original SA molecule [16][17][18][19] . In this way, since radicals generation rate it is presumed to be constant, as suggested by MVR (Figure 8) and temperature ( Figure 7) results, but the volatile compounds generation rate shows a time dependence, a constant MVR only will be reached once the surface of sample is covered with both reactions in equilibrium rate.…”

Section: Argon-oxygen Dischargementioning

confidence: 99%

Evaluation of sample temperature and applied power on degradation of stearic acid in inductively coupled radio frequency plasma

et al. 2014

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Plasma cleaning is a promising technology in surface treatments, despite technological interest its use is limited because its mechanisms still are not entirely understood. This work aims to evaluate how the applied power of an inductively coupled RF discharge at 13,56 MHz, with Ar and Ar+10%O 2 atmospheres, affects its capabilities to etch an organic molecule. Mass variation rate was used as direct characterization of degradation process and attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) was performed to search for residual molecular modifications. Additionally, optical emission spectroscopy (OES) measurements were performed to monitor the offer of active species in the gaseous volume. In experimental conditions was possible attain mass reduction from sample, with higher mass loss rate when applied power is increased. Material characterization shows the possibility of attain a high etch rate, while no structural modifications were detected, if the temperature is controlled.

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Section: Argon-oxygen Dischargementioning

confidence: 99%

Evaluation of sample temperature and applied power on degradation of stearic acid in inductively coupled radio frequency plasma

et al. 2014

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“…0.3 l s À1 , pressure of 10 Pa, electrode distance of 50 mm and its area 48 cm 2 , chamber volume ca. 1000 cm 3 , plasma volume 240 cm 3 ). The modified polymer samples were stored for 24 h at laboratory conditions or were immersed for 24 h in deionized water.…”

Section: Materials and Plasma Modificationmentioning

confidence: 99%

“…Plasma treatment has become an important industrial process for modifying polymer surfaces [3,4]. For example, polyethylene (PE), which is very cheap and easy to process, has excellent mechanical properties and good resistance to weathering.…”

Section: Introductionmentioning

confidence: 99%

“…Actually, a simple way to modify the chemical and physical states of the polymer surface, without altering the bulk properties, is by plasma treatment. The plasma treatment of polymers leads to the creation of new chemical groups [5,6], cross-linking and branching of the macromolecules and formation of lowmolecular weight oxidized structures [3,7,8], the rates of these processes being a function of the plasma reactivity. Due to ablation the surface topography of the polymer is affected [9e11].…”

Section: Introductionmentioning

confidence: 99%

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Ablation and water etching of poly(ethylene) modified by argon plasma

Švorčı́k

Kotál

Siegel

et al. 2007

Polymer Degradation and Stability

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“…In this case, the charged species without the chemically active species do not efficiently etch the SA, showing that the energy transferred from the charged species and the radiation from the discharge, using an Ar plasma, is not enough to etch SA. As presented by Wertheimer 17 , H 2 plasma has an intense radiation that interacts with carbon chains and degrades this. However, using the experimental set-up presented in Figure 1, when Ar-H 2 was used the MV was very small (Figure 4).…”

Section: Resultsmentioning

confidence: 97%

Influence of neutral and charged species on the plasma degradation of the stearic acid

et al. 2013

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In this work, stearic acid (SA) was degraded in an Ar-O 2 and Ar-H 2 post-discharge environment created by a plasma reactor with a microwave source and in an Ar, Ar-H 2 and Ar-O 2 DC (Direct Current) discharge environment created in a cathode-anode confined system. The afterglow region is useful for understanding the role of the chemically active species (O, O 2 , H and H 2 ). In contrast, the discharge region allows the observation of the effects of chemically active species, charged species (ions and electrons) and photons. The influence of these species on the grafting and etching of SA was evaluated by measuring the mass variation, mass variation rate and chemical composition. The results showed that when only chemically active oxygen species are present, the SA is preferentially grafted. However, when both photons and charged species are present, the SA is more efficiently etched. When the Ar-H 2 and Ar environments are utilized; the SA is not efficiently degraded.

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Industrial processing of polymers by low-pressure plasmas: the role of VUV radiation

Cited by 213 publications

References 42 publications

Evaluation of sample temperature and applied power on degradation of stearic acid in inductively coupled radio frequency plasma

Evaluation of sample temperature and applied power on degradation of stearic acid in inductively coupled radio frequency plasma

Ablation and water etching of poly(ethylene) modified by argon plasma

Influence of neutral and charged species on the plasma degradation of the stearic acid

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