Chemical Structure of EVA Films Obtained by Pulsed Electron Beam and Pulse Laser Ablation

Niemczyk, Agata; Moszyński, Dariusz; Jędrzejewski, Roman; Kwiatkowski, Konrad; Piwowarczyk, Joanna; Baranowska, J.

doi:10.3390/polym11091419

Cited by 13 publications

(10 citation statements)

References 28 publications

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“…Herein, the dark colors present better retention and fit than the transparent material as they absorb more energy [75]. Additionally, EVA structure can be degraded by several physical factors, like UV radiation, gamma radiation, and temperature [76].…”

Section: Ethylene Vinyl Acetate (Eva) Copolymermentioning

confidence: 99%

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Present Status in Polymeric Mouthguards. A Future Area for Additive Manufacturing?

et al. 2020

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Athletes from contact sports are more prone to orofacial injuries because of the exposure to possible shocks and collisions derived from physical proximity. The use of protector polymeric mouthguards proved to be useful in the prevention of the described injuries. There are different types of mouthguards with varying ranges of protection and prices, but they are all made from polymers and share the same propose: to absorb and dissipate the impact energy resulting from the shocks. As they are used inside the mouth, they should not impair breathing and speaking nor compromise the comfort of the athlete. However, the ideal mouthguard is yet to be created. The choice of the most appropriate polymeric material and the standard required properties have not yet been reported. Regardless of the numerous studies in this field, normalized control parameters for both material characterization and mouthguard fabrication are absent. This paper aims to present a review of the current types of available mouthguards and their properties/characteristics. Moreover, a detailed description of the most common polymers for the fabrication of mouthguards, together with the manufacturing techniques, are discussed.

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Section: Ethylene Vinyl Acetate (Eva) Copolymermentioning

confidence: 99%

“…Compared to other polyethylene resins, EVA is more flexible and very similar to rubber [68]. Moreover, this copolymer presents good adhesion to an extensive range of materials, like ceramics, metals, and other polymers [76,77].…”

Section: Ethylene Vinyl Acetate (Eva) Copolymermentioning

confidence: 99%

Present Status in Polymeric Mouthguards. A Future Area for Additive Manufacturing?

et al. 2020

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“…Chemical structure analysis based on infrared spectroscopy is a very useful technique able to determine the structure of thin films quite accurately as we have shown in our previous work [20]. Nonetheless, when using only one technique for the structure analysis, the limitation of this method has to be taken into account, especially in the case of non-homogeneous coatings.…”

Section: Introductionmentioning

confidence: 99%

“…Given the above, and our own experience with PLD and PED techniques [16,20,26], the aim of this work was to verify the hypothesis regarding the deposition of stoichiometric PTFE –( C F 2 – C F 2 ) n – thin films by both PLD and PED techniques, performing detailed chemical structure analysis by infrared spectroscopy in combination with a complementary surface sensitive technique—X-ray photoelectron spectroscopy. Additionally, in view of the “still open discussion” on the mechanism of ablation processes, the films were examined as-deposited (without post-process annealing) in order to determine the effect of PLD and PED on the material.…”

Section: Introductionmentioning

confidence: 99%

XPS and FTIR Studies of Polytetrafluoroethylene Thin Films Obtained by Physical Methods

et al. 2019

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Two methods—attenuated total reflection Fourier infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS)—have been used to analyze the chemical structure of polytetrafluorethylene (PTFE) thin coatings deposited by pulsed laser (PLD) and pulsed electron beam (PED) ablations. The volume of the analyzed materials is significantly different in these techniques which can be of great importance in the characterization of highly heterogeneous thin films. Optical microscopy, atomic force microscopy (AFM) and scanning electron microscopy (SEM) have been additionally used to examine the coating surface morphology. The studies have shown that in the case of thin polymer coatings deposited by physical methods, the application for chemical structure evaluation of complementary techniques, with different surface sensitivity, together with the use of surface topography imaging, provide unique insight into the film morphology. The results can provide information contributing to an in-depth understanding of the deposition mechanism of polymer coatings.

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“…At the very beginning, this technique was mainly employed for the deposition of both inorganic, i.e., superconductive MBa2Cu3O7-x, and organic, i.e., polytetrafluoroethylene (PTFE), thin films. The deposition applications of the technique expanded in the past years to include for example, biomedical materials, CuInGaSe2 Solar Cells, In2O3 nano-films, LaMnO3 thin Films, Poly (ethylene-co-vinyl acetate) films and nanostructured Ag thin films [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Gas type role on the dynamics of channel spark pulsed electron deposition system

Abdo

Elgarhy

Abouelsayed

et al. 2020

Al-Azhar Bulletin of Science

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In this paper, the effect of feeding gas type on the dynamics of channel spark pulsed electron deposition system is investigated. Electrical, magnetic, and optical characterisations of the system were measured for different feeding gases, oxygen (O2), nitrogen (N2), and argon (Ar). The discharge current for each gas type was measured with maximum value of 1189 A for O2 at-13 kV applied voltage. The discharge current and voltage waveforms were simulated by LRC circuit theory. Effect of gas pressure on the maximum discharge current and total inductance was also investigated. The beam current investigated by faraday cup and reached maximum electron beam current of 136 A for O2 gas. Two magnetic pickup coils were employed for the measurements of beam kinetic dynamics and the measured beam speed was around 0.4× 10 6 m/sec. Electron beam plasma density was calculated from faraday cup and magnetic coils signals and found to be 1.96×10 20 m-3. Optical emission spectra were also measured to identify reactive species and its role in electron beam interaction with graphite target for thin film deposition application. The ability of using the system for thin film deposition is demonstrated by depositing amorphous hydrogenated carbon (a-C:H) films over silicon substrates.

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Chemical Structure of EVA Films Obtained by Pulsed Electron Beam and Pulse Laser Ablation

Cited by 13 publications

References 28 publications

Present Status in Polymeric Mouthguards. A Future Area for Additive Manufacturing?

Present Status in Polymeric Mouthguards. A Future Area for Additive Manufacturing?

XPS and FTIR Studies of Polytetrafluoroethylene Thin Films Obtained by Physical Methods

Gas type role on the dynamics of channel spark pulsed electron deposition system

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