1. a Tadjik National State University , Rudaki pr. 17, Dushanbe, 734016, Tadjikistan
2. b Institute of High Molecular Compounds , Russian Academy of Sciences , Bolshoi pr. 31, V.O., St. Petersburg, 199004, Russia
3. c Institute of Problems of Mechanical Engineering , Russian Academy of Sciences , Bolshoi pr. 61, V.O., St. Petersburg, 199178, Russia