TY JOUR TI KW дорожный битум KW сополимер KW этилен KW винилацетат KW состав KW road bitumen KW copolymer KW ethylene KW vinyl-acetic ester KW structure JO Herald of Technological University AU Petrov, S.M. AU Ibragimova, D.A. AU Zakieva, R.R. AU Gadelshin, R.M. AU Gussamov, I.I. PY 2025 IS 17 PB Kazan National Research Technological University