Ultra-violet spectra studies of photodegradation of PVC films in presence of Fe(III) chelate complex

Abstract

A complex of Fe(III) with 4-amino-5-(pyridyl)-4H-1,2,4-triazole-3-thiol was prepared and evaluated as a photodegradation for rigid poly(vinyl chloride) (PVC). Polyvinyl chloride dissolved with Fe(III) complex in THF solvent to form PVC films of 5% (40 μm) thickness containing different concentrations (0.01, 0.02, 0.03, 0.04 and 0.05 g) of the complex by weight. These different samples were produced by the casting method from the solvent. The photodegradation of films was investigated using UV-visible spectra. The photostabilization activity of these compounds was determined by calculating the photodecomposition rate constant (Kd) for modified PVC films against a blank. PVC Triazole UV-light Fe(III) complex Photochemistry Photodegradation

Synthesis of 1,2,3-triazole derivatives based on propargyl ester of a saturated single-basic carbonic acid and para-azidobenzoic acid

“…para-Azidobenzoic acid (9) was synthesized by adding a drop of sodium azide solution to the diazonium salt (8) formed by the diazotization reaction of para-aminobenzoic acid (7) the yield of the product is 85% (Scheme 2). The melting point is 124 °C and is consistent with literature data [22,35,36,37].…”

“…Currently, the worldwide synthesis and biological activity of 1,2,3-triazoles are being studied rapidly. This is also evident from articles in prestigious magazines published in recent years [19][20][21][22][23]. Among the 1,2,3-triazole derivatives, various drugs with anti-tuberculosis, antiviral, antibacterial, anti-diabetic, antileishmaniasis, anti-inflammatory activities were found, and research in these areas is still ongoing [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39].…”

New stabilizers for polystyrene based on 2‐thioacetic acid benzothiazol complexes

“…These metal chelate complexes also function as radical scavengers through energy transfer and by forming unreactive charge transfer complexes between the metal chelate and the excited state of the chromophore (POO · ) and stabilize through resonating structures18 as shown in Scheme .…”

Spectroscopic, Physical and Topography of Photochemical Process of PVC Films in the Presence of Schiff Base Metal Complexes

“…In addition, antioxidants are known as a common photostabilizer, which help in preventing the deterioration of plastics [ 19 ]. As part of our own interest in the field of polymers chemistry [ 20 , 21 , 22 , 23 ], we have improved the photostability of polymers by using UV photostabilizers [ 24 , 25 , 26 , 27 , 28 ]. Now, we report the improvement in photostability of PVC using Schiff base metal complexes containing 4-(benzylideneamino)-5-(pyridin-4-yl)-4 H -1,2,4-triazole-3-thiol as new UV-stabilizers.…”