1. Institute of Macromolecules, Federal University of Rio de Janeiro, Rio de Janeiro 21945-970, Brazil
2. Leopoldo Américo Miguez de Mello Research and Development Center (Cenpes), Petrobras S.A., Rio de Janeiro 21945-970, Brazil
3. Program of Materials and Metallurgy Engineering/COPPE, Federal University of Rio de Janeiro, Rio de Janeiro 21945-970, Brazil