1. PPGE3M, Federal University of Rio Grande do Sul, Av. Bento Gonçalves, 9500; Porto Alegre RS 91501-970 Brazil
2. Department of Composite Materials; Leibniz-Institut für Polymerforschung Dresden e.V., Hohestraße 6; Dresden 01067 Germany
3. PGMAT, Caxias do Sul University, Rua Francisco Getúlio Vargas, 1130; Caxias do Sul RS 95070-560 Brazil