Spectroscopic and photochemical stability of polystyrene films in the presence of metal complexes
واصفات البياناتعرض سجل المادة الكامل
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 polystyrenein chloroform to produce modified PS using the casting method. PS films were irradiated ( = 250–380 nm) with a light absorptionintensity of 6.02 × 10−9ein dm−3s−1at room temperature. The photostabilization activity of the films was determined by monitoringvarious changes, such as the carbonyl index, hydroxyl index, weight loss, viscosity average molecular weight, surface morphologyand quantum yield of the chain scission.