1. Grupo de Investigación en Polímeros, School of Chemical Engineering Industrial University of Santander (UIS) Bucaramanga Santander Colombia
2. Department of Materials Engineering and Bioprocess, Chemical Engineering School State University of Campinas (UNICAMP) Campinas São Paulo Brazil
3. Programa de Engenharia Metalúrgica e de Materiais, COPPE Federal University of Rio de Janeiro – UFRJ Rio de Janeiro Brazil