Effect of thermal stabilizers on the photo-oxidative degradation of solid poly(vinyl chloride) |
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| Authors: | T.A. Skowronski J.F. Rabek B. Rånby |
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| Affiliation: | 1. Department of Polymer Technology, The Royal Institute of Technology, Stockholm, Sweden;1. Institute of Organic and Polymer Technology, Technical University, Wroclaw, Poland |
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| Abstract: | It has been found that metal (Ba, Ca, Cd and Pb) stearates and pure stearic acid have stabilizing effects on the photodehydrochlorination of poly(vinyl chloride) (PVC) and the formation of polyene structures. On the other hand the same compounds accelerate photo-oxidation of PVC. From oxygen uptake measurements at different temperatures we calculated the energy of activation of photo-oxidation. It was found that metal stearates decrease the energy of activation of photo-oxidation processes of PVC, whereas stearic acid increases it. A synergistic effect of an equimolecular mixture of Ba and Cd stearates has also been observed. |
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| Keywords: | Thermal stabilizers metal stearates photo-oxidative degradation poly(vinyl chloride) polyene structures |
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