Journal
MOLECULES
Volume 22, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/molecules22111849
Keywords
poly(vinyl chloride); functional groups indices; photodegradation; polyphosphates; inhibitors
Funding
- King Saud University, the Deanship of Scientific Research, Research Chairs
- Al-Nahrain University
- Tikrit University
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Three polyphosphates were used as inhibitors for poly(vinyl chloride) (PVC) photodegradation. The polyphosphates were added to PVC at a concentration of 0.5% by weight. The PVC films (40 mu m thickness) were irradiated at room temperature with ultraviolet (UV) light for up to 300 h. The changes in PVC films after irradiation were monitored by Fourier transform infrared spectroscopy, weight loss, viscosity-average molecular weight determination, and atomic force microscopy. These changes were very noticeable in the blank PVC films compared to the ones obtained when additives were used. The polyphosphates can inhibit the PVC photodegradation through direct absorption of UV light, interactions with PVC chains, and acting as radical scavengers.
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