Photoradiation chemistry of polymers

Milinchuk, V.K.

doi:10.1016/0168-583x(95)00545-5

Cited by 10 publications

(12 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The scintillation characteristics of a PS deteriorate under exposure to high doses of α-, β, and γ-rays and high intensities of light [52]. This results from irreversible damage to the polymer base, the formation of unstable radiolysis products (excited molecules, cations, anions, trapped electrons, and free radicals, which are stabilized in the rigid polymer matrix and quench the radioluminescence of scintillators [53]), and the degradation of the luminescent dyes. PMMA contains no groups capable of dissipating the energy absorbed in it; it is therefore actively destroyed under irradiation with high-energy particles (Table 3).…”

Section: The Thermal Stability and Radiation Resistance Of Scintillatmentioning

confidence: 98%

Plastic Scintillators Based on Polymethyl Methacrylate: A Review

Salimgareeva

Колесов

2005

Instrum Exp Tech

View full text Add to dashboard Cite

The scintillation properties of plastic scintillators based on polymethyl methacrylate with various luminescent dyes are considered. It is shown that replacing the naphthalene conventionally used in these scintillators as a secondary solvent with octadeuteronaphthalene and 1,3-divinylbenzene will not alter either their scintillation efficiency and optical transparency, or their thermal, light, and radiation-damage stability; replacing it with 1,1,3-trimethyl-3-phenylindan, however, improves all these characteristics. It is demonstrated that n-terphenyl, 2,5-diphenyloxazole, 2-biphenyl-5-phenyl-1,3-oxazole, 2-biphenyl-5-( α -naphthyl)-1,3-oxazole, 2-phenyl-5-(4-biphenylyl)-1,3,4-oxadiazole, and 2-(4'-tret -butylphenyl)-5-(4''-biphenylyl)-1,3,4-oxadiazole can be used as luminescent activators, and n-bis-( o -methylstyryl)-benzene and 1,4-di-(5-phenyl-2-oxazolyl)-benzene are applicable as wavelength shifters.

show abstract

Section: The Thermal Stability and Radiation Resistance Of Scintillatmentioning

confidence: 98%

Plastic Scintillators Based on Polymethyl Methacrylate: A Review

Salimgareeva

Колесов

2005

Instrum Exp Tech

View full text Add to dashboard Cite

show abstract

“…Nevertheless, it conveys reactivity onto the treated surface via plasma species, electrons, ions, and UV-radiation. In fact, inert gas plasma treatment is used in periods typically from 1s to several minutes, and this exposure is enough to abstract hydrogen and to produce free radicals at or near the surface which then interact to form cross-links and unsaturated groups; notwithstanding, these chemical and physical changes are restricted to the top several hundred angstroms without affecting bulk properties [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Cell Proliferation of HaCaT Keratinocytes on Collagen Films Modified by Argon Plasma Treatment

et al. 2010

View full text Add to dashboard Cite

Argon plasma treatment was used to modify the surface of atelocollagen films using a plasmochemical reactor. To evaluate the effects of the treatment, the untreated and treated samples were characterized by Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR), Scanning Electron Microscopy (SEM) imaging, and X-ray Photoelectron Spectroscopy (XPS) techniques. Cell growth was carried out by culturing human immortalized keratinocyte (HaCaT) cells and proliferation was measured via MTT assay. It was observed that argon plasma treatment significantly enhanced the extent of cell proliferation, which was ascribed to the favourable role of plasma treatment in inducing surface oxygen-containing entities together with increasing surface roughness. This can be considered as a potentially promising approach for tissue regeneration purposes.

show abstract

“…The bonding strength of specimens with an interface area of 1 mm 2 ranged from 40 to 60 MPa. When the interface area was increased to 2 mm 2 , the bonding strength decreased to [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] MPa. This is probably a result of the presence of a greater number of defects in specimens with a large bonding surface area (10).…”

mentioning

confidence: 99%

Evaluation of plasma treatment effects on improving adhesive–dentin bonding by using the same tooth controls and varying cross‐sectional surface areas

Dong

Ritts

Staller

et al. 2013

European J Oral Sciences

View full text Add to dashboard Cite

The objective of this study is to evaluate and verify the effectiveness of plasma treatment for improving adhesive/dentin interfacial bonding by performing micro-tensile bond strength (μTBS) test using the same-tooth controls and varying cross-sectional surface areas. Extracted unerupted human third molars were used by removing the crowns to expose the dentin surface. For each dentin surface, one half of it was treated with a non-thermal argon plasma brush, while another half was shielded with glass slide and used as untreated control. Adper Single Bond Plus adhesive and Filtek Z250 dental composite were then applied as directed. The teeth thus prepared were further cut into micro-bar specimens with cross-sectional size of 1×1 mm2, 1×2 mm2 and 1×3 mm2 for μTBS test. The test results showed that plasma treated specimens gave substantially stronger adhesive/dentin bonding than their corresponding same tooth controls. As compared with their untreated controls, plasma treatment gave statistically significant higher bonding strength for specimens having cross-sectional area of 1×1 mm2 and 1×2 mm2, with mean increases of 30.8% and 45.1%, respectively. Interface examination using optical and electron microscopy verified that plasma treatment improved the quality of the adhesive/dentin interface by reducing defects/voids and increasing the resin tag length in dentin tubules.

show abstract

Photoradiation chemistry of polymers

Cited by 10 publications

References 4 publications

Plastic Scintillators Based on Polymethyl Methacrylate: A Review

Plastic Scintillators Based on Polymethyl Methacrylate: A Review

Cell Proliferation of HaCaT Keratinocytes on Collagen Films Modified by Argon Plasma Treatment

Evaluation of plasma treatment effects on improving adhesive–dentin bonding by using the same tooth controls and varying cross‐sectional surface areas

Contact Info

Product

Resources

About