Studi pengaruh penambahan fraksi volume penguat carbon nano tubes (CNT) terhadap sifat mekanis dan konduktivitas listrik pelat bipolar berbasis nano komposit PP/C-CNT = Study of influences of addition volume fraction of carbon nano tubes (CNT) reinforcement to the mechanical and electrical conductivity properties of bipolar plate based on nano composite PP/C-CNT (Fakultas Teknik Universitas Indonesia, 2010)