Evaluation of schiff bases of 2, 5-dimercapto-1, 3, 4-thiadiazole as photostabilizer for poly (methyl methacrylate)
Joint Authors
Salih, Nadiyah Abd al-Karim
Yusuf, Imad
Salimon, Jumat
Bakir, Imad
Source
Journal of Saudi Chemical Society
Issue
Vol. 16, Issue 3 (31 Jul. 2012), pp.279-285, 7 p.
Publisher
Publication Date
2012-07-31
Country of Publication
Saudi Arabia
No. of Pages
7
Main Subjects
Topics
Abstract EN
The photostabilization of poly(methyl methacrylate) (PMMA) films by Schiff bases of 2,5-dimercapto-1, 3, 4-thiadiazole compounds 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 (Ucs) of these complexes in PMMA films was evaluated and found to range between 4.19 • 10_5 and 8.75 • 10_5.
Results obtained showed that the rate of photostabilization of PMMA in the presence of the additive followed the trend : [1] > [2] > [3] >[4] > [5].
According 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.
American Psychological Association (APA)
Yusuf, Imad& Bakir, Imad& Salimon, Jumat& Salih, Nadiyah Abd al-Karim. 2012. Evaluation of schiff bases of 2, 5-dimercapto-1, 3, 4-thiadiazole as photostabilizer for poly (methyl methacrylate). Journal of Saudi Chemical Society،Vol. 16, no. 3, pp.279-285.
https://search.emarefa.net/detail/BIM-351872
Modern Language Association (MLA)
Yusuf, Imad…[et al.]. Evaluation of schiff bases of 2, 5-dimercapto-1, 3, 4-thiadiazole as photostabilizer for poly (methyl methacrylate). Journal of Saudi Chemical Society Vol. 16, no. 3 (Jul. 2012), pp.279-285.
https://search.emarefa.net/detail/BIM-351872
American Medical Association (AMA)
Yusuf, Imad& Bakir, Imad& Salimon, Jumat& Salih, Nadiyah Abd al-Karim. Evaluation of schiff bases of 2, 5-dimercapto-1, 3, 4-thiadiazole as photostabilizer for poly (methyl methacrylate). Journal of Saudi Chemical Society. 2012. Vol. 16, no. 3, pp.279-285.
https://search.emarefa.net/detail/BIM-351872
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 285
Record ID
BIM-351872