Environmental performance of coordination complexes as PVC photostabilizers

Haddad, Raghad; Alsayed, Raghda; Ahmed, Dina S.; Bufaroosha, Muna; Salih, Nadia; Mohammed, Salam A.; Yousif, Emad

doi:10.1016/j.matpr.2020.12.733

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…Spectrophotometer 160A UV-Vis, (Shimadzu, Japan), was utilized to evaluate the differences of UV of the prepared PVC films. All films were irradiated by UV light at wavelength (λmax) of 313 [11]. The photodecomposition constant (kd) was calculated using equation (1):…”

Section: Uv Spectrophotometermentioning

confidence: 99%

“…Where Ao denotes the absorption intensity of PVC at a certain time, t0, A∞ denotes the absorption intensity of PVC at t, and At is the absorption intensity of PVC following UV irradiation at t. Thus, the photodecomposition constant (kd) value was derived from the slop of the first order process, which yields a straight line when ln(At ¬ A∞) and the irradiation time (t) are plotted [11]:…”

Section: Uv Spectrophotometermentioning

confidence: 99%

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Morphological, Photochemical and Spectroscopic Studies of Ibuprofen-Tin Complexes

Al-Ani

Ahmed

Al‐Mashhadani

et al. 2022

IJOIR

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Poly(vinyl chloride) (PVC) was prepared and the photo-stabilization of polymer films was studied using ultraviolet (UV) light. The efficiency of the synthesized polymer complex of ibuprofen-tin which is the photo-stabilizer in this study afterward of 300 hours of irradiation were evaluated by calculate the constant of PVC degradation rate. The outcome of this research has shown that the additives (ibuprofen-tin complexes) effect significantly on the decreased degradation constant compare to blank PVC, without additives the rate of degradation constant of PVC is greater than when the additives are added. The surface morphologies of the irradiated polymer film with additives were researches utilizing Field Emission Scanning Electron Microscope (FESEM). It can be seen that the polymer film with added additives is less roughness than the irradiated PVC (blank). The organotin complexes behave in this study as a photostabilizer to maintain the PVC from any decomposition by absorbing the incident light and convert it over the time as a heat to the polymeric chain.

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Section: Uv Spectrophotometermentioning

confidence: 99%

Section: Uv Spectrophotometermentioning

confidence: 99%

Morphological, Photochemical and Spectroscopic Studies of Ibuprofen-Tin Complexes

Al-Ani

Ahmed

Al‐Mashhadani

et al. 2022

IJOIR

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“…As we know, polymers break down easily under the irradiation of UV light. It is meaningful to add the photostabilizer to the polymers to reduce the impact of the UV light [40,41]. In the photochromic microcapsules in particular, UV light is necessary to obtain color-changing.…”

Section: Photochromic Performancementioning

confidence: 99%

Microencapsulation of Photochromic Solution with Polyurea by Interfacial Polymerization

Zhang

Yan

et al. 2021

Polymers

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Photochromic materials are interesting materials because of their color-changing property under UV light and visible light irradiation. However, they are vulnerable to many factors, such as pH oxygen, ion, solvent, etc. because of the unsaturated bonds existing on the photochromic molecular. Microencapsulation of the photochromic materials can separate them from the surroundings. Here, photochromic microcapsules using 3,3-Diphenyl-3H-naphtho[2,1-b] pyran (NP)/solution as core and polyurea as shell via interfacial polymerization were prepared, and bis(2,2,6,6-tetramethyl-4-piperidinyl)sebacate (HALS 770) was used as photostabilizer. Fourier transform infrared spectroscopy (FTIR), a laser particle size analyzer, a scanning electron microscope (SEM), a thermogravimetric analyzer and an ultraviolet-visible spectrophotometer were used for characterization. The results showed that the microcapsules had a uniform particle size of about 0.56 μm when the percentage of the oil phase (core) in the emulsion was less than 15%, the addition amount of the emulsifier was 0.4%, and the stirring rate was 1800r/min. The microcapsules showed better performance in thermal stability when the core/shell ratio was 1:1. The photostabilizer had little impact on the color-changing property of the microcapsule, but it could protect the microcapsules from UV light radiation aging.

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The inhibition performance of a novel iron (III), copper (II), and nickel (II) complexes with Schiff base ligand derived from salicylaldehyde and p–phenylene diamine on Polyvinyl chloride photodegradation

Mohamed

Negm

Youssef

et al. 2023

Preprint

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The stabilization of polyvinyl chloride polymer has a great concern for researchers due to its high instability in the environmental conditions of heat and ultraviolet arrays. Herein, three metal complexes of Schiff base ligand were prepared and their chemical structures were confirmed using elemental analysis, FTIR, 1H-NMR, and UV/Vis spectra. The prepared metal complexes were incorporated in PVC as photo-stabilizers. Only 0.5% by weight of these prepared Schiff bases metal complexes was blended with the PVC polymer to form films with a width of (50 µm). The prepared samples were exposed to ultraviolet irradiation time was varied ranging from 0 to 300 h and the impact of irradiation scheduled upon the PVC stabilization was examined each 50 h. The degree of degradation of PVC in the presence and absence of the different stabilizers was determined using various techniques, including the degree of oxygenated compounds formed, degree of unsaturation, viscosity, and degree of deterioration. The results showed that in the native PVC, the degradation progressively increased over time at the conditions of the experiments. The addition of the stabilizers decreased the degradation considerably. The formation of carbonyl, hydroxyl, and unsaturated intermediates was decreased in the presence of Cu-L, and Ni-L. While Fe-L stabilizer showed weak efficiency. The reasons for the stabilization and the mechanism of the degradation/stabilization processes were discussed based on the electronegativity of the metal ions and the antioxidant activities of the different metal complexes.

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Environmental performance of coordination complexes as PVC photostabilizers

Cited by 3 publications

References 14 publications

Morphological, Photochemical and Spectroscopic Studies of Ibuprofen-Tin Complexes

Morphological, Photochemical and Spectroscopic Studies of Ibuprofen-Tin Complexes

Microencapsulation of Photochromic Solution with Polyurea by Interfacial Polymerization

The inhibition performance of a novel iron (III), copper (II), and nickel (II) complexes with Schiff base ligand derived from salicylaldehyde and p–phenylene diamine on Polyvinyl chloride photodegradation

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