Kinetic study of the poly(vinyl chloride)/titanium dioxide nanocomposites photodegradation under accelerated ultraviolet and visible light exposure. (31st March 2014)
- Record Type:
- Journal Article
- Title:
- Kinetic study of the poly(vinyl chloride)/titanium dioxide nanocomposites photodegradation under accelerated ultraviolet and visible light exposure. (31st March 2014)
- Main Title:
- Kinetic study of the poly(vinyl chloride)/titanium dioxide nanocomposites photodegradation under accelerated ultraviolet and visible light exposure
- Authors:
- Ghaebi Mehmandoust, Shadi
Alizadeh, Reza
Babaluo, Ali Akbar - Abstract:
- <abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>In the present study, poly(vinyl chloride)/titanium dioxide (PVC/TiO<sub>2</sub>) nanocomposite films containing different amounts of synthesized TiO<sub>2</sub> nanoparticles and commercial rutile powder were irradiated for 5112 hr, under exposure of artificial ultraviolet and visible lights in three different intensities. The rate of degradation was determined by using weight loss data and was found to follow a pseudo‐first order kinetic model. To determine the overall rate constant of degradation, <italic>k</italic>, a possible mechanism of the photodegradation was considered. The rate equation demonstrated <italic>k</italic> as a function of TiO<sub>2</sub> concentration and irradiation intensity at each wavelength. The overall rate constant of PVC/TiO<sub>2</sub> samples were calculated to be varied in the range of 6–16 × 10<sup>−7</sup> hr<sup>−1</sup>, at all investigated conditions. The kinetic study represented that by adding synthesized TiO<sub>2</sub> nanoparticles, even at low content, and with increasing their concentration, the photodegradation rate of nanocomposites decreased considerably compared with the composite samples. Likewise, by adding nanoparticles, a significant increase in the nanocomposites lifetime was achieved. The effect of irradiation intensity was investigated according to the reciprocity law experiments, and it was found that photodegradation occurred in<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>In the present study, poly(vinyl chloride)/titanium dioxide (PVC/TiO<sub>2</sub>) nanocomposite films containing different amounts of synthesized TiO<sub>2</sub> nanoparticles and commercial rutile powder were irradiated for 5112 hr, under exposure of artificial ultraviolet and visible lights in three different intensities. The rate of degradation was determined by using weight loss data and was found to follow a pseudo‐first order kinetic model. To determine the overall rate constant of degradation, <italic>k</italic>, a possible mechanism of the photodegradation was considered. The rate equation demonstrated <italic>k</italic> as a function of TiO<sub>2</sub> concentration and irradiation intensity at each wavelength. The overall rate constant of PVC/TiO<sub>2</sub> samples were calculated to be varied in the range of 6–16 × 10<sup>−7</sup> hr<sup>−1</sup>, at all investigated conditions. The kinetic study represented that by adding synthesized TiO<sub>2</sub> nanoparticles, even at low content, and with increasing their concentration, the photodegradation rate of nanocomposites decreased considerably compared with the composite samples. Likewise, by adding nanoparticles, a significant increase in the nanocomposites lifetime was achieved. The effect of irradiation intensity was investigated according to the reciprocity law experiments, and it was found that photodegradation occurred in two regimes with respect to irradiation intensity. The calculated overall rate constants were validated by the experimental data. Copyright © 2014 John Wiley &amp; Sons, Ltd.</p> </abstract> … (more)
- Is Part Of:
- Polymers for advanced technologies. Volume 25:Number 8(2014:Aug.)
- Journal:
- Polymers for advanced technologies
- Issue:
- Volume 25:Number 8(2014:Aug.)
- Issue Display:
- Volume 25, Issue 8 (2014)
- Year:
- 2014
- Volume:
- 25
- Issue:
- 8
- Issue Sort Value:
- 2014-0025-0008-0000
- Page Start:
- 799
- Page End:
- 808
- Publication Date:
- 2014-03-31
- Subjects:
- Polymers -- Periodicals
668.9 - Journal URLs:
- http://onlinelibrary.wiley.com/ ↗
- DOI:
- 10.1002/pat.3298 ↗
- Languages:
- English
- ISSNs:
- 1042-7147
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 6547.742200
British Library DSC - BLDSS-3PM
British Library STI - ELD Digital store - Ingest File:
- 4393.xml