Abstract
Poly(vinyl chloride) (PVC), a polymer widely used in common household and industrial materials, undergoes photodegradation upon ultraviolet irradiation, leading to undesirable physicochemical properties and a reduced lifetime. In this study, four telmisartan organotin(IV) compounds were tested as photostabilizers against photodegradation. PVC films (40-µm thickness) containing these compounds (0.5 wt%) were irradiated with ultraviolet light at room temperature for up to 300 h. Changes in various polymeric parameters, including the growth of hydroxyl, carbonyl, and alkene functional groups, weight loss, reduction in molecular weight, and appearance of surface irregularities, were investigated to test the efficiency of the photostabilizers. The changes were more noticeable in the blank PVC film than in the films containing the telmisartan organotin(IV) compounds. These results reflect that these compounds effectively inhibit the photodegradation of PVC, possibly by acting as hydrogen chloride and radical scavengers, peroxide decomposers, and primary photostabilizers. The synthesized organotin(IV) complexes could be used as PVC additives to enhance photostability.
Highlights
Poly(vinyl chloride) (PVC) is a common and widely used plastic produced by the polymerization of vinyl chloride [1]
PVC is used in several industrial applications, such as the production of bottles, roofing sheets, floor coverings, pipes, cable insulation, packaging foils, and various medicinal products [5,6]
Two telmisartan triorganotin(IV) and two telmisartan diorganotin(IV) compounds were used as photostabilizers to inhibit the photodegradation of PVC upon prolonged UV irradiation of up to 300 h
Summary
Poly(vinyl chloride) (PVC) is a common and widely used plastic produced by the polymerization of vinyl chloride [1]. There are two main types of PVC, namely, rigid and flexible PVC [2]. PVC resists degradation better than flexible PVC and is more resistant to chemicals (e.g., acids and bases), water, fire, and weather [3]. The addition of phthalate plasticizers to PVC during manufacturing produces soft PVC [4]. The addition of wood flour fillers enhances its biodegradation. PVC is used in several industrial applications, such as the production of bottles, roofing sheets, floor coverings, pipes, cable insulation, packaging foils, and various medicinal products [5,6]
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