1. Lviv Polytechnic National University, S. Bandera 12, 79013 Lviv, Ukraine
2. Bohdan Khmelnytsky National University, Shevchenko 81, 18031 Cherkassy, Ukraine
3. Department
of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Plentas 19, LT-50254 Kaunas, Lithuania
4. Rzeszów University of Technology, W. Pola 2, Rzeszów 35-959, Poland