TY - JOUR ID - TI - SYNTHESIS AND EVALUTION OF NEW BIS-BENZOTRIAZOLE PHOTOSTABILIZER SYNTHESIS AND EVALUTION OF NEW BIS-BENZOTRIAZOLE PHOTOSTABILIZER AU - Ziyad T. AL-Malki Ziyad T. AL-Malki AU - Zainab J. Sweah Zainab J. Sweah AU - Wisam A.Radhi Wisam A.Radhi PY - 2019 VL - 15 IS - 29-3 SP - 277 EP - 291 JO - Journal of Misan Researches مجلة ابحاث ميسان SN - 18156622 27897354 AB - Polymers such as plastics, as well as naturally occurring polymer materials such as wood, are extensively used in building construction and in greenhouse applications where they are routinely exposed to sunlight The UV-B content in sunlight is well known to affect adversely the mechanical properties of these materials, limiting their useful life. Presently their outdoor lifetimes depend on the use of photostabilizers in the case of plastics and on protective surface coatings in the case of wood. In the present work the 2-hydroxyphenyl benzotriazoles are typical UV absorbing compounds that can diminish the photodegradation of polymers. Here the synthesis of two benzotriazole compounds is described. Each compounds obtained are characterized by IR spectra, CHN and the melting points. The PVC films incorporated with these stabilizers where subjected to UV irradiation and then tested for any change in the carbonyl index and hydroxyl index in different temperatures to evaluate the efficiency of the new stabilizers. The PVC films incorporated with these stabilizers where subjected to UV irradiation and then tested for any change in the carbonyl index to evaluate the efficiency of the new stabilizers

Polymers such as plastics, as well as naturally occurring polymer materials such as wood, are extensively used in building construction and in greenhouse applications where they are routinely exposed to sunlight The UV-B content in sunlight is well known to affect adversely the mechanical properties of these materials, limiting their useful life. Presently their outdoor lifetimes depend on the use of photostabilizers in the case of plastics and on protective surface coatings in the case of wood. In the present work the 2-hydroxyphenyl benzotriazoles are typical UV absorbing compounds that can diminish the photodegradation of polymers. Here the synthesis of two benzotriazole compounds is described. Each compounds obtained are characterized by IR spectra, CHN and the melting points. The PVC films incorporated with these stabilizers where subjected to UV irradiation and then tested for any change in the carbonyl index and hydroxyl index in different temperatures to evaluate the efficiency of the new stabilizers. The PVC films incorporated with these stabilizers where subjected to UV irradiation and then tested for any change in the carbonyl index to evaluate the efficiency of the new stabilizers ER -