Optical property modification of PMMA by ion-beam implantation

Hong, Won G.; Choi, Hunsoo; Kim, Young-Suk; Kim, Gi-dong

doi:10.1016/s0169-4332(00)00698-x

Cited by 78 publications

(23 citation statements)

References 17 publications

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“…These include e.g. polyethylene (PE) [7][8][9], polycarbonate (PC) [10,11], polymethylmethacrylate (PMMA) [12,13] as well as polyethylene terephthalate (PET). * corresponding author; e-mail: mturek@kft.umcs.lublin.pl Polyethylene terephthalate (C 10 H 8 O 4 ) n is a highly transparent (≈ 90% in the visible region) thermoplastic polymer resin.…”

Section: Introductionmentioning

confidence: 99%

Modification of Optical and Electrical Properties of PET Foils by He⁺, Ne^+ and Ar^+ Implantation

et al. 2017

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Thin (3 µm) polyethylene terephthalate (PET) foils were irradiated with 135 keV He + , Ne + and Ar + ions with the fluences up to 5 × 10 15 cm −2 . Changes of chemical structure of the polymer were studied with the Fourier transform infrared and Raman spectroscopy -breaking of numerous chemical bonds, polymer chain cross-linking as well as formation of sp 2 hybridised carbon clusters and cluster networks were demonstrated. The increase of the implanted sample absorbance with the implantation fluence in the UV-VIS spectra as well as the decrease of optical band-gap energy (2.75 and 2.0 eV for He and Ne, respectively, at 5 × 10 15 cm −2 ) are observed. Decrease of bulk resistance of heavily treated samples by ≈ 5 orders of magnitude is determined. Measurements of the sheet resistance confirm that the sample becomes conducting also on the reverse (unimplanted) side of the foil. Both of these effects depend on the impinging ion mass -they are the strongest for Ar. The increase of both ac conductance and dielectric constant is observed in the frequency range up to 2 MHz and these changes rise with the impinging ion mass.

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Section: Introductionmentioning

confidence: 99%

Modification of Optical and Electrical Properties of PET Foils by He⁺, Ne^+ and Ar^+ Implantation

et al. 2017

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“…It is clear that increasing the concentration of HDPE in the polymer blend leads to decreasing the peak intensity, and there is no any shift in the peak position for all amounts of the added material to the blend, that means there is no chemical interaction when added HDPE to the matrix and the decrement in the absorption is attributed to the decrement offshoot and tangles of polymeric chains, The fact that the linear high density polyethylene (unbranched) [25,26]. (8) shows the optical transmittance spectra for (PP/PMMA/HDPE) blends as function of wavelength for several concentration of HDPE, the polymer transmittance increase with increasing the concentration of high density polyethylene this is due to added (HDPE), which leads to decrease positional planers in the forbidden energy gap, which leads to increased transmittance [27]. The absorption coefficient (α) is calculated using equation (4).…”

Section: Optical Propertiesmentioning

confidence: 99%

“…Polymethyl methacrylate is highly transparent plastic with good mechanical strength and is used variously from commodities to industrial applications. Accordingly, the PMMA is a candidate substrate for optical and medical applications [6,7] as bone cement, dialyser, scaffolds for tissue engineering and potential candidate to waveguide production [8]. The polymer has very good optical properties but has poor scratch resistance.…”

Section: Introductionmentioning

confidence: 99%

Effect of High Density Polyethylene (HDPE) on Structural and Optical Properties of (PP/PMMA) Blends

Habeeb

Abbas

2015

ILCPA

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ABSTRACT. In the present work, Polypropylene (PP) was blended with poly methyl methacrylate (PMMA) to form (PP/PMMA) polymer blends. High Density Polyethylene (HDPE) was mixed into these blends at different weight fractions (2,4,6,8) % wt to form (PP/PMMA/HDPE) blends were prepared using an one screw extruder. results obtained from Scanning Electron Microscopy (SEM) revealed that there was a reduction in surface roughness any decrease in clusters, drilling and bends, as for Fourier Transform Infrared (FT-IR) spectrometry showed no change in the wave numbers of the functional groups. The optical properties of samples are investigated by measuring optical absorption spectra in the wavelength range from 260 to 1100 nm. this results show that E g of the blends increases with increasing high density polyethylene contents, the indirect optical band gaps for (PP/PMMA) and (PP/PMMA/HDPE) blends were estimated to be about 2.83,2.9,2.95,3and 3.1 eV for indirect allowed transitions, whereas the indirect forbidden band gaps were determined as 2,2.1,2.15,2.2 and 2.3 eV with increase high density Polyethylene contents, respectively. The absorbance, absorption coefficient, extinction coefficient and the imaginary dielectric constant of (PP/PMMA/HDPE) decreases with increasing of HDPE percentages except the transmittance, refraction index and real part of the dielectric constant increase with increasing of high density polyethylene.

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“…No caso específico do PMMA, é utilizada para aumentar a rugosidade [19], melhorar as propriedades ópticas [20][21][22], químicas [21,22], estruturais [22], e aumentar a absorção de proteínas [23].…”

Section: Introductionunclassified

Implantação de Íons de Nitrogênio em PMMA Através de uma Fonte Kaufman

Fontoura¹,

Wanke²,

Aguzzoli³

2017

Sci. cum Ind.

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ResumoA modificação de superfícies é uma técnica que a engenharia tem feito uso há muito tempo, para melhoria de propriedades em materiais. O poli metil-metacrilato (PMMA), por ser um material de constante uso em aplicações biomédicas, exige que sua superfície apresente características favoráveis à adesão celular e compatibilidade com tecidos. Os polímeros, de uma maneira geral, quando submetidos a tratamentos em plasma, tendem a formar grupos funcionais que alteram propriedades ópticas, químicas, físicas e de biocompatibilidade. Em função disso, este trabalho propôs realizar a funcionalização de substratos de PMMA através da fonte de íons Kaufman. Amostras de PMMA foram submetidas ao feixe de íons de nitrogênio gerado pela fonte Kaufman, em diversas condições. A caracterização foi feita pelas técnicas de GD-OES, FTIR e EDS. Ficou comprovado, através do perfil de concentração de nitrogênio obtido por GD-OES, que a quantidade de nitrogênio na superfície aumenta gradativamente com o tempo de implantação e a potência. Outro indício foi a análise em FTIR, que mostrou presença de aminas nas faixas entre 1654-655 cm -1 e 3300-3700 cm -1 . A análise em EDS, porém, comprovou também a presença de ferro e cromo, agentes citotóxicos, que precisam ser eliminados para a continuidade dos trabalhos. Palavras-chaveImplantação de íons de nitrogênio, fonte de íons Kaufman, modificação superficial de PMMA Implantation of Nitrogen Ions through a Kaufman Ion Source AbstractSurface modification is a technique that engineering has been using for a long time, in order to improve the properties of materials. Poly (methyl methacrylate) (PMMA), for being a material of constant use in biomedical applications, demands that its surface offers favorable characteristics in cell adhesion and tissue compatibility. Polymers, generally speaking, when submitted to plasma treatments, tend to form functional groups that alter optical, chemical, physical and biocompatibility properties. Taking all of this into consideration, this work proposed to functionalize PMMA substrates through a Kaufman ion source. PMMA samples were submitted to a nitrogen ion beam generated through the Kaufman source, in different conditions. Characterization was carried out by the techniques of GD-OES, FTIR and EDS. It was proved, through nitrogen concentration profile obtained by GD-OES, that the amount of nitrogen in the surface increased gradually with implantation time and supplied power. The FTIR analysis was another evidence of nitrogen presence, as amines were detected in the bands between 1654-655 cm -1 and 3300-3700 cm -1 . The EDS analysis, though, proved that iron and chromium, cytotoxic agents, are also present and therefore, they must be eliminated from the process, so that future studies can be carried out.

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Optical property modification of PMMA by ion-beam implantation

Cited by 78 publications

References 17 publications

Modification of Optical and Electrical Properties of PET Foils by He⁺, Ne^+ and Ar^+ Implantation

Modification of Optical and Electrical Properties of PET Foils by He⁺, Ne^+ and Ar^+ Implantation

Effect of High Density Polyethylene (HDPE) on Structural and Optical Properties of (PP/PMMA) Blends

Implantação de Íons de Nitrogênio em PMMA Através de uma Fonte Kaufman

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Optical property modification of PMMA by ion-beam implantation

Cited by 78 publications

References 17 publications

Modification of Optical and Electrical Properties of PET Foils by He+, Ne^+ and Ar^+ Implantation

Modification of Optical and Electrical Properties of PET Foils by He+, Ne^+ and Ar^+ Implantation

Effect of High Density Polyethylene (HDPE) on Structural and Optical Properties of (PP/PMMA) Blends

Implantação de Íons de Nitrogênio em PMMA Através de uma Fonte Kaufman

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Modification of Optical and Electrical Properties of PET Foils by He⁺, Ne^+ and Ar^+ Implantation

Modification of Optical and Electrical Properties of PET Foils by He⁺, Ne^+ and Ar^+ Implantation