Properties of Polymer Electrolyte Membranes Prepared by Blending Sulfonated Polystyrene with Lignosulfonate - Gonggo, Siang Tandi; 1Physical Chemistry Research Groups, Faculty of Teacher Training and Educational Sciences, Tadulako University, Kampus Bumi Tadulako, Tondo, Jl. Sukarno Hatta Km 9 Tondo, Palu 94117, Indonesia (ITB Journal Publisher, LPPM ITB, 2014)