Sage Journals: Discover world-class research

Abstract

The temperature dependent instrumented falling weight impact (IFWI) behavior of glass mat reinforced thermoplastic polypropylene (GMT-PP) composites with continuous (GM-C) and discontinuous (GM-D) fiber mats were studied at three different temperatures: −40°C, room temperature (RT) and +90°C. Apart from the mat type the matrix viscosity and the fiber/matrix adhesion were also varied in the GMT-PP samples.

It was established that the mat type is that parameter which controls the fracture and failure behavior. The high perforation impact resistance of GM-C compared to GM-D is due to an efficient stress redistribution via the continuous fibers and rovings within the mat. Effects of the matrix and interface variations could not be detected during IFWI. The testing temperatures also affected the IFWI characteristics marginally, especially in case of GM-C reinforced PP.

Keywords

failure fracture glass fiber mat instrumented impact test polypropylene temperature dependence

Get full access to this article

View all access options for this article.

References

1. Karger-Kocsis, J. 1999. “Glass mat reinforced thermoplastic polypropylene” in Polypropylene: An A–Z Reference, J. Karger-Kocsis , ed., Dordrecht: Kluwer Academic, pp. 284–290.

2. Oelgarth, A. , Dittmar, H. , Stockreiter, W. and Wald, H.H. 1998. “GMT oder LFT,” Kunststoffe, 88:480–486.

3. Ericson, M. and Berglund, L. 1992. “Deformation and fracture of glass-mat-reinforced polypropylene,” Compos. Sci. Technol., 43:269–281.

4. Bigg, D.M. 1994. “The impact behavior of thermoplastic sheet composites,” J. Reinf. Plast. Compos., 13:339–354.

5. Berglund, L.A. and Ericson, M.L. 1995. “Glass mat reinforced polypropylene” Chapter 5 in Polypropylene: Structure, Blends and Composites, Vol. 3, Karger-Kocsis, J. ed., London: Chapman and Hall, pp. 202–227.

6. Karger-Kocsis, J. , Harmia, T. and Czigány, T. 1995. “Comparison of the fracture and failure behavior of polypropylene composites reinforced by long glass fiber and by glass mats,” Compos. Sci. Technol., 54:287–298.

7. Jones, D.P. , Leach, D.C. and Moore, D.R. 1986. “The application of instrumental falling weight impact techniques to the study of toughness in thermoplastics” Plast. Rubb. Process. Appl., 6:67–79.

8. McCrum, N.G. , Read, B.E. and Williams, G. 1967. Anelastic and Dielectric Effects in Polymeric Solids, Chapter 10, Wiley, N.Y.

9. Schledjewski, R. and Karger-Kocsis, J. 1994. “Dynamic mechanical analysis of glass mat reinforced polypropylene” J. Thermoplast. Compos. Mater., 7:270–277.

10.

10. Lindhagen, J. and Berglund, L. 1997. “Low temperature strength and notch sensitivity of glass mat polypropylene” J. Cold Regions Eng., 11:180–197.

11.

11. Karger-Kocsis, J. 1995. “Microstructural aspects of fracture in polypropylene and in its filled, chopped fiber and fiber mat reinforced composites” Ch. 4 in Polypropylene: Structure, Blends and Composites, Vol. 3 (Ed., J. Karger-Kocsis ), Chapman and Hall, London, pp. 142–201.

12.

12. Karger-Kocsis, J. 2000. “Swirl mat and long discontinuous fiber mat-reinforced polypropylene composites. Status and future trends” Polym. Compos. 21:514–522.

Comparison of the Instrumented Falling Weight Impact Response of Polypropylene Composites Reinforced by Continuous and Discontinuous Fiber Mats

Abstract

Keywords

Get full access to this article

References