Study the Influence of UV-Irradiation on the Photo Stability of Pure and Plasticized Poly (4-Vinyl Biphenyl) in Solid Films

Ani, Khalid E. Al; Ramadhan, Afrah Essa; Khanfar, Suha

doi:10.4236/msa.2017.813075

Cited by 2 publications

(2 citation statements)

References 47 publications

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“…In an earlier study, it has been reported that irradiation of polystyrene solid films resulted in changes in many bands in the FT IR spectra [9], and also was noticed in the irradiated pure and blended poly (fluoro styrene) isomers with phthalate and terephthalate plasticizers in solid films [24,25]. The same observation was noticed in the irradiation of poly (4-vinyl biphenyl) solid films [41].…”

Section: Ft-ir Spectra For Non-irradiated and Irradiated Pure And Blesupporting

confidence: 60%

Effect of UV-Irradiation on Fluorescence of Poly (Para-Ethoxystyrene) Films with Phthalate and Terephthalate Plasticizers

Ani¹,

Sieadi²,

Mouamin³

et al. 2018

JMSE-B

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The photodegradation of irradiated thin films of poly (para-ethoxystyrene) with 265 nm radiations in the presence of air and as a function of irradiation time has been studied using UV-VIS, fluorescence and FT-IR spectroscopic techniques. The increase in irradiation time caused an increase in the intensity of the absorption band of the polymer, thus indicating a possibility of photodegradation of polymeric chains. The influence of increase in irradiation times on pure poly (ethoxystyrene) films caused a decrease in the intensity of the fluorescence band and the appearance of new broad band at longer wavelength and to decrease with increase in irradiation time. The influence of added phthalate and terephthalate plasticizers on photo-oxidative degradation was also investigated, and found to increase the photodegradation processes in polymeric chains. The photo-quenching rate constant was found to increase with the increase of the molar mass and bulkiness of the used plasticizers and to increase with the increase in irradiation time. The rate constant of the photo quenching process was found to decrease with the increase in the amount of added plasticizers, indicating that the added plasticizers may act as UV-absorbers which inhibit the photodegradation process. The analysis of the FT-IR spectra of the irradiated and non-irradiated samples, showed a noticeable formation of new bands, and their intensity was found to increase with the increase in irradiation time and also with the increase in the amount of added plasticizer. In addition, the observed increase in the intensities of the carbonyl and hydroxyl absorption regions of the FT-IR spectra, provide evidence for the photodegradation as well as photo-oxidation of polymeric chains.

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Section: Ft-ir Spectra For Non-irradiated and Irradiated Pure And Blesupporting

confidence: 60%

Effect of UV-Irradiation on Fluorescence of Poly (Para-Ethoxystyrene) Films with Phthalate and Terephthalate Plasticizers

Ani¹,

Sieadi²,

Mouamin³

et al. 2018

JMSE-B

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“…As for the nature of the quenching itself, when considering the characteristics of the absorption spectra for DMPs [23] and for the imidazolate species forming the modified ZIF (UV absorption spectra, Figure S11 in the Supporting Information) suggests that they do not absorb at the wavelengths involved in the fluorescence spectra (excitation at 288 nm and emission of the imine within the Z8P ZIF between 400 and 540 nm (Figure S10a in the Supporting Information)). Therefore, it must be assumed that the quenching is not due to quenching effects by absorption of the emitted radiation by the imine.…”

Section: Resultsmentioning

confidence: 99%

Tailored Mobility in a Zeolite Imidazolate Framework (ZIF) Antibody Conjugate**

Chapartegui-Arias

Raysyan

Belenguer

et al. 2021

Chemistry A European J

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Zeolitic imidazolate framework (ZIF) hybrid fluorescent nanoparticles and ZIF antibody conjugates have been synthesized, characterized, and employed in lateral-flow immunoassay (LFIA). The bright fluorescence of the conjugates and the possibility to tailor their mobility gives a huge potential for diagnostic assays. An enzyme-linked immuno-sorbent assay (ELISA) with horseradish peroxidase (HRP) as label, proved the integrity, stability, and dispersibility of the antibody conjugates, LC-MS/MS provided evidence that a covalent link was established between these metal-organic frameworks and lysine residues in IgG antibodies.

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Study the Influence of UV-Irradiation on the Photo Stability of Pure and Plasticized Poly (4-Vinyl Biphenyl) in Solid Films

Cited by 2 publications

References 47 publications

Effect of UV-Irradiation on Fluorescence of Poly (Para-Ethoxystyrene) Films with Phthalate and Terephthalate Plasticizers

Effect of UV-Irradiation on Fluorescence of Poly (Para-Ethoxystyrene) Films with Phthalate and Terephthalate Plasticizers

Tailored Mobility in a Zeolite Imidazolate Framework (ZIF) Antibody Conjugate**

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