Spectroscopic and photochemical stability of polystyrene films in the presence of metal complexes

Abstract

Five metal complexes containing Ni(II), Cu(II), Zn(II), Cd(II) and Sn (II) metals and 4-amino-5-(pyridine-4-yl)-4H-1,2,4-triazole-3-thiol have been prepared for use as polystyrene photostabilizers. The additives (0.5% by weight) were mixed with polystyrene in chloroform to produce modified PS using the casting method. PS films were irradiated ( = 250-380 nm) with a light absorption intensity of 6.02 × 10 −9 ein dm −3 s −1 at room temperature. The photostabilization activity of the films was determined by monitoring various changes, such as the carbonyl index, hydroxyl index, weight loss, viscosity average molecular weight, surface morphology and quantum yield of the chain scission.

Fabrication of Novel Ball-Like Polystyrene Films Containing Schiff Base Microspheres as Photostabilizers

“…Such additives act mainly as ultraviolet (UV) stabilizers, radical scavengers, quenchers, antioxidants, flame retardants and antistatic agents [11,12,13,14]. The most common additives used to stabilize PS against photodegradation are heterocycles [15,16,17,18,19,20,21], metal complexes [22,23] and aromatics [24,25,26].…”

SEM morphological analysis of irradiated polystyrene film doped by a Schiff base containing a 1,2,4-triazole ring system

“…Colorants, stabilizers, and plasticizers can act as UV absorbers and stabilizers, and therefore protect PS upon exposure to irradiation [8,9]. Various PS additives containing aromatics [10], heterocycles [11], and metal complexes [12] have been used to reduce the rate of photodegradation. Such additives act as flame retardants, antioxidants, quenchers, UV absorbers, and radical scavengers [13][14][15][16][17].…”

Photochemical Study of Different Thicknesses of Polystyrene Films Containing Ni(II) Complex against photodegradation

“…radiation [7]. Photodegradation and photooxidation degradation of polystyrene [8][9][10] have been discussed many papers and reviews. Photodegradation is caused by the absorption of photons thatis found in sunlight, such as infrared radiation (760 -2500nm.…”