پژوهشگاه پلیمر و پتروشیمی ایران با همکاری انجمن پلیمر ایران مجله علوم و تکنولوژی پلیمر 10163255 23 6 2013 01 19 A Study of UV Resistance of a Water-based Polyurethane Lacquer Containing Nano Ceria بررسی مقاومت لاک پلی یورتان پایه آبی در برابر پرتو فرابنفش در مجاورت نانوسریم اکسید 441 454 620 10.22063/jipst.2013.620 FA آرش سعادت منفرد محسن محسنی Journal Article 2013 01 19 Cerium oxide (Ceria) nano particle, as photodegradation prevention agent was studied in water-based polyurethane clear coat  systems. Polyurethane coatings show superior weathering resistance compared with acrylic melamine systems. However, any chemical change has detrimental effects on the property profile of PU coatings. Coatings containing various amounts of cerium oxide nanoparticles were prepared and their weathering resistance was evaluated using simulated UV cabinet. To this end the extent and mechanism of degradation was studied utilizing UV-Vis and FTIR-ATR spectroscopy as well as DMTA analysis. The results revealed that Ceria nano particles with concentration of 1.44 % (wt) absorb beyond 92.5% of UV light of UV-B region and showed an efficiency of 2000 times as of organic UV absorbers. http://jips.ippi.ac.ir/article_620_9af0d341eeb123e3ec86638006f1dd77.pdf