1. Department of Materials Engineering, Laboratory of Polymers - LAPOL, Federal University of Rio Grande do Sul, UFRGS, 9500 Bento Gonçalves Avenue; Postal Code 15010 Porto Alegre 91501-970 Brazil
2. Softer Brasil Compostos Termoplásticos LTDA; 275 Edgar Hoffmeister Avenue, Campo Bom 93.700-000, Brazil