New stabilizers for polystyrene based on 2-N-salicylidene-5-(substituted)-1,3,4-thiadiazole compounds

Emad Yousif, Jumat Salimon, Nadia Salih

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The photostabilization of polystyrene (PS) films by 2-N-salicylidene-5-(substituted)-1,3,4-thiadiazole compounds was investigated. The PS 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 carbonyl and hydroxyl indices with irradiation time. The changes in viscosity average molecular weight of PS with irradiation time were also tracked (using benzene as a solvent). The quantum yield of the chain scission (Φ cs) of these complexes in PS films was evaluated and found to range between 3.31×10 -6 and 7.89×10 -6. Results obtained showed that the rate of photostabilization of PS in the presence of the additive follows the trend:SN>SC>SB>SI>SPAccording to the experimental results obtained, several mechanisms were suggested depending on the structure of the additive. Among UV absorption, peroxide decomposer and radical scavenger for photostabilizer additives mechanisms were suggested.

Original languageEnglish
Pages (from-to)299-306
Number of pages8
JournalJournal of Saudi Chemical Society
Volume16
Issue number3
DOIs
Publication statusPublished - Jul 2012

Fingerprint

Polystyrenes
Irradiation
Peroxides
Quantum yield
Chloroform
Benzene
Hydroxyl Radical
Casting
Molecular weight
1,3,4-thiadiazole
Viscosity
Monitoring

Keywords

  • 1,3,4-Thiadiazole
  • Photochemistry
  • Photostabilizer
  • PS
  • UV absorber
  • UV-vis spectroscopy

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

New stabilizers for polystyrene based on 2-N-salicylidene-5-(substituted)-1,3,4-thiadiazole compounds. / Yousif, Emad; Salimon, Jumat; Salih, Nadia.

In: Journal of Saudi Chemical Society, Vol. 16, No. 3, 07.2012, p. 299-306.

Research output: Contribution to journalArticle

Yousif, Emad ; Salimon, Jumat ; Salih, Nadia. / New stabilizers for polystyrene based on 2-N-salicylidene-5-(substituted)-1,3,4-thiadiazole compounds. In: Journal of Saudi Chemical Society. 2012 ; Vol. 16, No. 3. pp. 299-306.
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