University of Kashan Journal of Nanostructures 2251-7871 15 3 2025 07 01 Synthesis, Characterization of New Nanocomplex and Lifetime Study of Polyvinyl Chloride and Polystyrene Polymers 1416 1427 115041 10.22052/JNS.2025.03.056 EN Atheer Abdulsahib AliAl-Sammak Department of Chemistry, College of Science, University of Wasit, Kut, 52002, Iraq Basma Esam Jasim Department of Chemical Industrial, Institute of Technology, Middle Technical University, Al Zafaraniya,10074, Baghdad, Iraq Nibras Abdul-Ameer Aboud Department of Chemical Industrial, Institute of Technology, Middle Technical University, Al Zafaraniya,10074, Baghdad, Iraq Kamal Rashid Al Jorani Department of Chemistry, College of Science, University of Wasit, Kut, 52002, Iraq Abdulla Suraj Al-Sammak Polymer Research Unit, College of Science, Al- Mustansiriyah University, Al- Mustansiriyah, 10052, Baghdad, Iraq Ahmed A. Ahmed Department of Chemistry, College of Engineering, University of Wasit, Wasit, 52001, Iraq Journal Article 2025 04 09 The ligand 5-(naphthalen-1-ylmethyl)-4-(((1E,2E)-3-phenylallylidene)amino)-4H-1,2,4-triazole-3-thiol in micro size used to synthesize the new cobalt nanocomplex using the sonochemical method. The new cobalt nanocomplex[Dichlorobis(5-(naphthalen-1-ylmethyl)-4-(((1E,2E)-3-phenylallylidene) amino)-4H-1, 2, 4-triazole-3-thiol) cobalt(II)] hydrate, was diagnosed by spectroscopic methods  X-Ray diffraction, where the average crystal of the prepared particles was (45 nm), and using the Field Emission Scanning Electron Microscopy (FESEM) the average nano size was about (41 nm) and Atomic force microscopy (AFM) statistical distribution of diameters showed results within the nanomaterial limit (62.72 nm) this is consistent with the measurements of both (X-Ray Diffraction) and (FESEM). Also, pure polyvinyl chloride (PVC) and polystyrene (PS) films were prepared alone, and in the presence of the inorganic nano complex prepared as an additive; the follow-up of the optical fragmentation and photoinhibition of the polymeric films prepared with the presence and absence of the nano complex, the accelerated irradiation device, which had an intensity of 4×10-5 einstine.ed-3.sec and by using the infrared absorbance (FTIR). Hydroxyl groups (IOH), carbon (ICO), and polyene (IPO) for polyvinyl chloride and polystyrene with and without the addition of cobalt nanocomplex with the irradiation time, as well as the ultraviolet radiation absorption to calculate the photodissociation speed constant of the polymeric films, in addition to the weight loss and changes on the surface of the films. The impact of temperature, and light, on the lifetime of Polyvinyl chloride and Polystyrene Polymers has been studied in the presence and absence of the nanocomplex. In general, increased stability and lifetime of polymers were observed in the presence of the nanocomplex. https://jns.kashanu.ac.ir/article_115041_54d192f9d013ff3182144fe337b7b81d.pdf