Instrumented Perforation Impact Response of Polypropylene Composites with Hybrid Reinforcement Flax/Glass and Flax/Cellulose Fibers

Abstract

The transverse perforation impact behavior of flax mat-reinforced polypropylene (PP) composites with additional discontinuous cellulose (LyocelliTM, L) and discontinuous glass (G) fiber mat was investigated at a constant reinforcement content (50 wt.%). The resistance to perforation impact of the PP/flax composite was strongly improved by the hybridization with L and G fibers. Enhanced resistance to perforation impact of the hybridized composites was also reflected in the Charpy impact strength values. This improvement was attributed to an enhanced strength, which affected the overall failure behavior as well. The failure mode was inspected in scanning electron microscopy (SEM) and discussed.

Keywords

polypropylene composites natural fiber glass fiber cellulose fiber instrumented falling weight impact hybrid reinforcement

References

1. Bledzki, A. K. and Gassan, J. 1999. "Composites Reinforced with Cellulose Based Fibers," Prog. Polym. Sci., 221-274.

2. Vazquez, A. and Dominguez, V. A. 1999. "Bagasse Fiber-Polypropylene Based Composites," J. Thermoplast. Compos. Mater., 12: 477-497.

3. Mieck, K.-P. 1999. "Natural Fiber/Polypropylene Composites," in Polypropylene: An A-Z Reference, ed. by J. Karger-Kocsis , Kluwer Publishers, Dordrecht, 527-532.

4. Bledzki, A. K. , Reinmane, S. and Gassan, J. 1996. "Properties and Modification Methods for Vegetable Fibers for Natural Fibers Composites," J. Appl. Polym. Sci., 59:1329-1336.

5. Gassan, J. and Bledzki, A. K. 1999. "Miglichkeiten zur Kontrolle Festigkeit und Impactzahigkeit in naturfaser-verstarkten Kunststoffen," 2nd International Wood and Natural Fibre Composites Symposium, June 28-29, Kassel, Germany: 11-1-11-9.

6. Mieck, K.-P. , Nechwatal, A. and Knobelsdorf, C. 1999. "Faser-Matrix-Haftung in Kunststoffverbunden aus Thermoplastischer Matrix und Flachs: 1. Die Ausrustung mit Silanen, 2. Die Anwendung von funktionalisiertem Polypropylen," Angew. Makromol. Chemie, 224: 73-88/225: 37-49.

7. Jones, D. P. , Leach, D. C. and Moore, D. R. 1986. "The Application of Instrumented Falling Weight Impact Techniques to the Study of Toughness in Thermoplastics," Plastics and Rubber Processing and Applications, 6:67-79.

8. Mieck, K.-P., Reumann, T. and Hauspurg, Ch. 1998. "EinfluB von Faserstruktur und Verbundaufbau auf die Ddmpfungseigenschaften von Naturfaserverstirkten Kunststoffen," Gummi, Fasern, Kunststoffe, 51:740-743.

9. Cheresh, M. C. and McMichael, S. 1987. "Instrumented Impact Test Data Interpretation," in Instrumented Impact Testing of Plastics and Composite Materials, ASTM STP 936, ed. by S. L. Kessler , G. C. Adams , S. B. Driscoll and D. R. Ireland , Am. Soc. Test. Mater., Philadelphia, 9-23.

10.

10. Karger-Kocsis, J. , Harmia, T. and Czigany, T. 1995. "Comparison of the Fracture Behavior of Polypropylene Composites Reinforced by Long Glass Fibers and by Glass Mats," Compos. Sci. Technology, 54:287-298.

11.

11. Karger-Kocsis, J. 1992. "Instrumented Impact Testing of a Glass Swirl Mat-Reinforced Reaction Injection-Molded Polyamide Block Copolymer (NBC)," J. Appl. Polymer Sci., 45:1595-1609.

12.

12. Piggott, M. R. 1992. "Interface Properties and Their Influence of Fiber-Reinforced Polymers," in Composite Applications: The Role of Matrix, Fiber and Interface, ed. by Vigo, T. L. and Kinzig, B. J. , VCH Publishers, N. Y., 221-266.