The effect of annealing on the energy gap of Polyimide (PI) and Polyethylene terephthalate (PET) Polymers. Iraqi Journal of Science, [S. l.], v. 46, n. 1, p. 141–144, 2025. DOI: 10.24996/ijs.2005.46.1.%g. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/15007.. Acesso em: 8 feb. 2025.