Artículos de revistas
Polyolefins Reinforced With Short Vegetal Fibers: Sisal Vs. Curauá [poliolefinas Reforçadas Com Fibras Vegetais Curtas: Sisal Vs. Curauá]
Registro en:
Polimeros. , v. 21, n. 3, p. 168 - 174, 2011.
1041428
10.1590/S0104-14282011005000036
2-s2.0-80054707553
Autor
Spinace M.A.S.
Janeiro L.G.
Bernardino F.C.
Grossi T.A.
De Paoli M.-A.
Institución
Resumen
There is growing interest in reinforced polymer composites using short vegetal fibers to replace glass fibers for several reasons. The composite fibers are produced from renewable resources, being biodegradable and less abrasive to the processing equipment, in addition to possessing a lower density than the glass fibers. Since their thermal degradation onset is at 200 °C, they can be used to reinforce thermoplastics processed below this temperature and thermosets. Several vegetal fibers have been used as reinforcing agent, including sisal and cuaruá. However, there is controversy in the literature about the composites final properties. In this work we compare the properties of composites of high density polyethylene or polypropylene with 20 wt. (%) of short sisal or curauá fibers, with or without a coupling agent. All composites were processed by extrusion and molded by injection, under exactly the same conditions, and the mechanical properties were compared. The curauá fibers presented a higher tensile resistance than the sisal fibers, and the composites with curauá fibers had slightly higher tensile and flexural resistance compared to the sisal fiber composites. The situation is opposite in the impact resistance results, with sisal composites displaying higher impact resistance. Since sisal fibers are more fragile than curauá fibers, during processing there is a higher fracture of sisal in comparison to curauá, inducing these differences in composites mechanical properties. 21 3 168 174 (2010) Disponível em, , www.abiplast.org.br, Abiplast, Acesso em: 13 abr Gassan, A.K., Bledski, J., (1999) Prog. Polym. Sci., 24, p. 221 Spinacé, M.A.S., Lamber, C.S., Fermoselli, K.K.G., De Paoli, M.A., (2009) Carbohydr. Polym., 77, p. 47 Santos, P.A., Spinacé, M.A.S., Fermoselli, K.K.G., De Paoli, M.A., (2009) Polímeros, 19, p. 31 Behrens, D., (1999) Curauá-Fäser - Eine Pflanzenfaser als Konstruktionswerkstof?, p. 159. , Verlag Dr. Köster, Berlin Trindade, W.G., Hoareau, W., Megiatto, J.D., Razera, I.A.T., Castellan, A., Frollini, E., (2005) Biomacromology, 6, p. 2485 Spinacé, M.A.S., Fermoselli, K.K.G., De Paoli, M.A., (2009) J. Appl. Polym. Sci., 112, p. 3686 Martin, A.R., Martins, M.A., Mattoso, L.H.C., Silva, O.R.R.F., (2009) Polímeros, 19, p. 40 Iozzi, M.A., Martins, G.S., Martins, M.A., Ferreira, F.C., Job, A.E., Mattoso, L.H.C., (2010) Polímeros, 20, p. 25 Carvalho, L.H., Cavalcanti, W.S., (2006) Polímeros, 16, p. 33 Martins, G.S., Iozzi, M.A., Martins, M.A., Mattoso, L.H.C., Ferreira, F.C., (2004) Polímeros, 14, p. 326 Iannace, S., Ali, R., Nicolais, L., (2001) J. Appl. Polym. Sci., 79, p. 1084 Joseph, P.V., Joseph, K., Thomas, S., (1999) Compos. Sci. Technol., 59, p. 1625 Josepha, P.V., Rabello, M.S., Mattoso, L.H.C., Josepha, K., Thomas, S., (2002) Compos. Sci. Technol., 62, p. 1357 Rabello, M., (2000) Aditivação de Polimeros, p. 193. , Artliber, São Paulo Mano, B., Araújo, J.R., Spinacé, M.A.S., De Paoli, M.-A., (2010) Compos. Sci. Technol., 70, p. 29 Marinelli, A.L., Monteiro, M.R., Ambrosio, J.D., Branciforti, M.C., Kobayashi, M., Nobre, A.D., (2008) Polimeros, 18, p. 92 Hughes, M., (2004) Low Environmental Impact Polymers, p. 80. , N. Tucker & M. Johnson (Eds), Rapra Technology, Shawbury Araujo, J.R., Mano, B.I.S., Spinacé, M.A.S., De Paoli, M.-A., Vegetal biomicrofibril polyolefin composites prepared by extrusion (2008) The Polymer Processing Society 24th Annual Meeting, pp. 1-6. , Salerno Mano, B.I., Spinacé, M.A.S., De Paoli, M.A., Polypropylenec omposite reinforced with natural fiber: Processing and coupling agent effect (2007) Anais 23th Annual Meeting of the Polymer Processing Society, pp. 3-17. , Salvador, BA