Mechanism of photostabilization of poly(methy methacrylate) films by 2-thioacetic acid benzothiazol complexes

Emad Yousif, Jumat Salimon, Nadia Salih

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The photostabilization of poly(methy methacrylate) (PMMA) films by 2-thioacetic acid benzothiazol with Sn(II), Cd(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 3.64×10-5 and 7.44×10-5. Results obtained showed that the rate of photostabilization of PMMA in the presence of the additive followed the trend:Ni(L)2>Cu(L)2>Zn(L)2>Cd(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 additives mechanisms were suggested.

Original languageEnglish
Pages (from-to)306-311
Number of pages6
JournalArabian Journal of Chemistry
Volume7
Issue number3
DOIs
Publication statusPublished - 2014

Fingerprint

Methacrylates
Acids
Irradiation
Quantum yield
Peroxides
Chlorine compounds
Benzene
Casting
Molecular weight
Viscosity
Chloroform
Monitoring
Hydroxyl Radical
thioacetic acid

Keywords

  • 2-Thioacetic benzothiazol acid
  • Photochemistry
  • Photostabilizer
  • PMMA
  • UV absorber
  • UV-light

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Mechanism of photostabilization of poly(methy methacrylate) films by 2-thioacetic acid benzothiazol complexes. / Yousif, Emad; Salimon, Jumat; Salih, Nadia.

In: Arabian Journal of Chemistry, Vol. 7, No. 3, 2014, p. 306-311.

Research output: Contribution to journalArticle

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