SIFAT MEKANIK TERMOPLASTIK ELASTOMER POLIPROPILENA (PP) DENGANFILLER CAMPURAN ABU TANDAN KOSONG KELAPA SAWIT (ATKKS) DAN CARBON BLACK (CB). einstein e-j. 2021, 9 (2), 45-50. https://doi.org/10.24114/einstein.v9i2.26193.