Abstract
In this work, three Ibuprofen tin complexes were synthesized and characterized by Fourier Transform Infrared spectroscopy (FTIR), 1H and 119Sn-Nuclear Magnetic Resonance (NMR), and Energy Dispersive X-ray (EDX) spectroscopies to identify the structures. The complexes were mixed separately with poly(vinyl chloride) (PVC) to improve its photo-stability properties. Their activity was demonstrated by several approaches of the FTIR to exhibit the formation of new groups within the polymer structure due to the exposure to UV light. Moreover, the polymer’s weight loss during irradiation and the average molecular weight estimation using its viscosity before and after irradiation were investigated. Furthermore, different techniques were used to study the surface morphology of the PVC before and after irradiation. Field-emission scanning electron microscopy (FESEM) and optical microscope demonstrated that applying Ibuprofen tin complexes keeps the surface of PVC smoother, with fewer cracks and spots after irradiation comparing to the blank PVC. Finally, It seems possible that such synthesized Ibuprofen tin complexes can work as excellent photo-stabilizers of PVC. In particular, complex 1 showed the best results among other stabilizers due to the large conjugation system of the stabilizer.
Highlights
Many known tin (IV) complexes are related to the common prescription Rx Sn(L)4−x, where L could be an inorganic or organic ligand, and R is an aryl or alkyl group [1]
In the last five decades, thousands, or maybe millions, of organometallic compounds have been synthesized, where the greater number was for organotin materials
We report the synthesis of Ibuprofen tin complexes and the evaluation of their activity as photo-stabilizers for the poly(vinyl chloride) (PVC)
Summary
Many known tin (IV) complexes are related to the common prescription Rx Sn(L)4−x , where L could be an inorganic or organic ligand, and R is an aryl or alkyl group [1]. In the last five decades, thousands, or maybe millions, of organometallic compounds have been synthesized, where the greater number was for organotin materials Their applications in the industry as corrosion inhibitors, plastic photo-stabilizers, medical helpers, etc., have increased [3,4]. In 1930, Germany and the United States manufactured PVC that consists of chlorinated hydrocarbon polymer This polymer has been utilized widely around the world as one of the most important plastics because of its low cost, flame retardancy, chemical resistance, elasticity, light weight, Surfaces 2020, 3, 579–593; doi:10.3390/surfaces3040039 www.mdpi.com/journal/surfaces. The low light stability of PVC will lead to a loss of HCl molecules in a process called discoloration, and eventually cause a severe degradation and chemical and physical alterations of the polymer properties. This is quite an interesting project for the environment because it is going to reduce the consumption of plastic, which is causing a big problem for the marine eco-system
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