Vy, N. and Duy, L. 2020. The The research to improve the mechanical properties and the water barrier properties of polyvinyl ancol film by graphen oxide. Science & Technology Development Journal: Natural Sciences. 4, 2 (Jun. 2020), 421-429. DOI:https://doi.org/https://doi.org/10.32508/stdjns.v4i2.601.