Abstract
The influence of weathering on fracture toughness, Jc, yield strength, σy, local ultrasonic velocity, VR, and microhardness, Hu, in unreinforced and a short glass-fibre-reinforced polyester-based thermoplastic ″Xenoy″ has been investigated. Unreinforced material weathered for 11 months outdoors in Perth, West Australia, exhibited a significant decrease in VR and Jc, whereas little change was shown in σy, Hu and the fracture surface morphology. Irradiation for 1000 h by artificial ultraviolet rays upon the unreinforced material caused a considerable increase in Hu and only a slight deterioration in VR of the surface layer. Filling with the short fibres induced an improvement in σy and a large reduction in Jc for the unreinforced material. The natural weathering of the reinforced material caused a small reduction in Jc but a large degradation in the slope of the R-curve. It was concluded that the measurement of Jc and the slope of R-curve in combination with VR and Hu was an effective way to study the effects of weathering on engineering plastics. © 1998 Chapman & Hall
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References
M. M. Qayyum and J. R. White, J. Mater. Sci. 21 (1986) 2391.
H. Bertilsson, B. FranzÉn and J. KubÁt, Plast. Rubber Process. Appl. 10 (1988) 137.
Idem,Plast. Rubber Process. Appl. ibid. 10 (1988) 145.
M. Just, Kunststoffe-German Plastics 80 (1990) 33.
G. KÄmpf, K. Sommer and E. Zirngiebl, Prog. Organ. Coatings 19 (1991) 69.
A. Sommer, E. Zirngiebl, L. Kahl and M. Schoenfelder, ibid. 19 (1991) 79.
M. Sebaa, C. Servens and J. Pouyet, J. Appl. Polym. Sci. 45 (1992) 1049.
A. Campeotto, G. M. Ferguson and A. Jefferson, Mater. Forum 16 (1992) 267
D. Shiroda, in “Proceedings of the Endurance Performance of Polymers in Japan”, (Japanese Society for Materials Science, Tokyo, 1993) pp. 56–61.
T. CzigÁny, Z. A. Mohd ishak, T. Heitz and J. Karger-kocsis, Polym. Composit. 17 (1996) 900.
T. L. Anderson, “Fracture Mechanics”, 2nd Edn (CRC Press, Ann Arbor, MI, 1995) pp. 131–132.
J. D. Landes and J. A. Begley, “Fract. Analysis” ASTM STP 560 (American Society for Testing and Materials, Philadelphia, PA, 1974) pp. 170–182.
S. Hashemi and J. G. Williams, Plast. Rubber Process. Appl. 6 (1986) 363.
K. Yamanaka, in “Proceedings of the 15th Japan Conference of Materials Science”, (Japanese Society for Materials Science, Tokyo, 1992) pp. 59–65.
K. Friedrich, L. A. Carlsson, J. W. Gillespie Jr and J. Karger-Kocsis, in “Thermoplastic Composite Materials ”, edited by L.A. Carlsson (Elsevier Science, Amsterdam, 1991) p. 233.
N. S. Choi and K. Takahashi, J. Mater. Sci. 31 (1996) 731.
A. G. Gibson and G.A. Williams, Polym. Eng. Sci. 25 (1985) 968.
J. A. Nairn and P. Zoller, J. Mater. Sci. 20 (1985) 355.
T. J. Chapman, J. W. Gillespie and J. C. Seferis, J. Compos. Mater. 24 (1990) 616.
J. D. Achenbach, “Wave Propagation in Elastic Solids”, (North-Holland, Amsterdam, 1975) pp. 187–194.
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Choi, N.S., Takahashi, K., Oschmann, D. et al. Influence of weathering on unreinforced and short glass fibre reinforced thermoplastic polyester. Journal of Materials Science 33, 2529–2535 (1998). https://doi.org/10.1023/A:1004340816197
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DOI: https://doi.org/10.1023/A:1004340816197