- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
Photodegradation Study of PVC By New Metal Complexes of Thiourea Derivatives | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 31, 2014, Pages 501-513 | ||
| Authors | ||
| Omer A. Hassan; Ali. M. Otaiwi; Abeer. A | ||
| Abstract | ||
| Abstract Two series of coordination complexes of Sn(II), Co(II), Ni(II) and Cu(II) metal with N-diisobutyl-N/-2,4-dichlorobenzoyl thiourea (IBT) and N-diPropyl-N/-2,4-dichlorobenzoyl thiourea (PBT) as a ligands were prepared and characterized. These complexes were obtained in high yield from ethanolic solution of both ligand and salt. The formed complexes results from the salt-ligand interaction with participation of both salt cation and anion. Information on the coordination chemistry of these complexes was derived from IR, UV-Visible spectra, elemental analysis and Conductivity study. On coordination electronic structures of these ligands change as whole, affecting practically all their vibrational pattern, however, within that complex pattern some vibrations provide valuable information on the nature of the studied complexes. These thiourea derivatives behave as neutral ligands, which coordinate the metal ion through the sulfur and oxygen atoms. Further more; we used the molar ratio method to find the ratio of coordination between the metal ions and ligands by using THF as a solvent, as it shows the ratio 2 ligands to 1 metal for all prepared complexes. The Photostabilization activity of these complexes on Poly (vinyl chloride) film was investigated. Where the photostabilisation activity of these compounds were determined by monitoring the carbonyl and polyene indices with irradiation time. The change in viscosity average molecular weight of PVC were also followed with irradiation time (using THF solvent) According to the experimental results obtained we suggest some mechanisms depending on the structure of the additives. UV absorption, peroxide decomposer and radical scavenger for photostabilizer additives were suggested. | ||
|
Statistics Article View: 11 PDF Download: 2 |
||