Preparation and study of the physicochemical characteristics of multilayer polymer composites based on poly(ethyleneimine)-stabilized copper nanoparticles and poly(sodium 2-acrylamide-2-methyl-1-propanesulfonate) - Selenova, Bagadat; Ayazbayeva, Aigerim; Shakhvorostov, Alexsey; Kabdrakhmanova, Sana; Nauryzova, Saule; Kudaibergenov, Sarkyt (Chemical Bulletin of Kazakh National University, 2021)