Effect of molecular mass of oligoester block and the ratio of components on the formation process of poly(methyl methacrylate)/polyurethane semi-IPN - L. F. Kosjanchuk; T. D. Ignatova; O. I. Antonenko; L. A. Vorontsova; O. V. Babich; V. F. Shumskij (Ukrainian Chemistry Journal, 2014)