Effect of modified aerosil on the formation process, viscoelastic and mechanical properties of polymer matrices based on PMMA/PU IPNs - L. F. Kosianchuk; O. I. Antonenko; T. D. Ihnatova; N. V. Babkina; V. P. Shumskyi; L. O. Vorontsova; O. O. Brovko; O. V. Babich; I. P. Hetmanchuk (Polymer journal, 2019)