Photochemical stability and photostabilizing efficiency of poly(methyl methacrylate) based on 2-thioacetic acid-5-phenyl-1,3,4-oxadiazole complexes

Emad Yousif, Mustafa Abdalla, Ahmed Ahmed, Jumat Salimon, Nadia Salih

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The photostabilization of poly(methyl methacrylate) (PMMA) films by new types of 2-thioacetic acid-5-phenyl-1,3,4-oxadiazole with Sn(II), Ni(II), Zn(II), and Cu(II) complexes was investigated. The PMMA films containing concentration of complexes 0.5% by weight were produced by the casting method from chloroform solvent. The photostabilization activities of these compounds were determined by monitoring the hydroxyl index with irradiation time. The changes in viscosity average molecular weight of PMMA with irradiation time were also tracked (using benzene as a solvent). The quantum yield of the chain scission (Φcs) of these complexes in PMMA films was evaluated and found to range between 5.22 × 10−5 and 7.75 × 10−5. Results obtained showed that the rate of photostabilization of PMMA in the presence of the additive followed the trend: Ni(L)2>Ni(L)2>Zn(L)2>Sn(L)2According to the experimental results obtained, several mechanisms were suggested depending on the structure of the additive. Among them, UV absorption, peroxide decomposer and radical scavenger for photostabilizer mechanisms were suggested.

Original languageEnglish
Pages (from-to)S595-S601
JournalArabian Journal of Chemistry
Volume9
DOIs
Publication statusPublished - 1 Sep 2016

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Polymethyl Methacrylate
Polymethyl methacrylates
Acids
Irradiation
Peroxides
Quantum yield
Chloroform
Chlorine compounds
Benzene
Hydroxyl Radical
Casting
Molecular weight
thioacetic acid
1,3,4-oxadiazole
Viscosity
Monitoring

Keywords

  • 1,3,4-Oxadiazole
  • Carboxylate
  • Photochemistry
  • Photostabilizer
  • PMMA
  • UV absorber
  • UV–vis spectroscopy

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Photochemical stability and photostabilizing efficiency of poly(methyl methacrylate) based on 2-thioacetic acid-5-phenyl-1,3,4-oxadiazole complexes. / Yousif, Emad; Abdalla, Mustafa; Ahmed, Ahmed; Salimon, Jumat; Salih, Nadia.

In: Arabian Journal of Chemistry, Vol. 9, 01.09.2016, p. S595-S601.

Research output: Contribution to journalArticle

Yousif, Emad ; Abdalla, Mustafa ; Ahmed, Ahmed ; Salimon, Jumat ; Salih, Nadia. / Photochemical stability and photostabilizing efficiency of poly(methyl methacrylate) based on 2-thioacetic acid-5-phenyl-1,3,4-oxadiazole complexes. In: Arabian Journal of Chemistry. 2016 ; Vol. 9. pp. S595-S601.
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