Synthesis of Polyurethane/Silica Modified Epoxy Polymer Based on 1,3-Propanediol for Coating Application - Nuraini, Lutviasari; Research Center for Metallurgy and Material, Indonesian Institute of Sciences, Kawasan Puspiptek Serpong, Tangerang Selatan 15314, Banten Indonesia (Universitas Gadjah Mada, 2017)