Mousa Omar G, El-Hiti Gamal A, Baashen Mohammed A, Bufaroosha Muna, Ahmed Ahmed, Ahmed Ahmed A, Ahmed Dina S, Yousif Emad
Department of Chemistry, College of Science, Al-Nahrain University, Baghdad 64021, Iraq.
Cornea Research Chair, Department of Optometry, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia.
Polymers (Basel). 2021 Feb 6;13(4):500. doi: 10.3390/polym13040500.
Poly(vinyl chloride) (PVC) undergoes photodegradation induced by ultraviolet (UV) irradiation; therefore, for outdoor applications, its photostability should be enhanced through the use of additives. Several carvedilol tin complexes were synthesized, characterized and mixed with PVC to produce thin films. These films were irradiated at 25 °C with a UV light (λ = 313 nm) for up to 300 h. The reduction in weight and changes in chemical structure and surface morphology of the PVC films were monitored. The films containing synthesized complexes showed less undesirable changes than the pure PVC film. Organotin with a high content of aromatics was particularly efficient in inhibiting photodegradation of PVC. The carvedilol tin complexes both absorbed UV light and scavenged radicals, hydrochloride, and peroxides and, therefore, photostabilized PVC.
聚氯乙烯（PVC）会因紫外线（UV）照射而发生光降解；因此，对于户外应用，应通过使用添加剂来提高其光稳定性。合成了几种卡维地洛锡配合物，对其进行了表征，并与PVC混合以制备薄膜。这些薄膜在25°C下用紫外线（λ = 313 nm）照射长达300小时。监测了PVC薄膜的重量减少以及化学结构和表面形态的变化。含有合成配合物的薄膜比纯PVC薄膜显示出更少的不良变化。具有高芳烃含量的有机锡在抑制PVC光降解方面特别有效。卡维地洛锡配合物既吸收紫外线，又清除自由基、盐酸盐和过氧化物，因此使PVC具有光稳定性。
