Photo-sensitized degradation of CCl4-doped polystyrene in the solid phase |
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| Affiliation: | 1. Department of Pharmaceutical Sciences, Health Sciences Center, Federal University of Pernambuco, 50740-520 Recife, PE, Brazil;2. Department of Fundamental Chemistry, Center for Exact and Nature Sciences, Federal University of Pernambuco, 50740-560 Recife, PE, Brazil;1. School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia;2. Faculty of Engineering, University of Peradeniya, Peradeniya, Sri Lanka |
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| Abstract: | The photo-degradation of carbon tetrachloride (CCl4)-doped polystyrene film has been investigated by ultraviolet (uv) and Fourier transform infrared (FTIR) spectroscopic techniques and by gel and viscosity measurements. On photo-irradiation of CCl4-doped polystyrene film, the amount of oxygenated products and unsaturation increased with the concentration of carbon tetrachloride up to 5 mol%. Changes in gel fraction and number of chain scissions showed a similar trend to those of the amount of oxygenated products and unsaturation. These experimental results show that the degradation of polystyrene is photo-sensitized by added carbon tetrachloride. A possible mechanism for the photo-degradation of CCl4-doped polystyrene is proposed. |
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