Journal of Materials Science

, Volume 24, Issue 1, pp 173–182 | Cite as

The microhardness of injection moulded polystyrene and polyethylene

  • B. L. Evans
Papers
Received:
Accepted:

Abstract

Injection moulded plaques of polystyrene and of two types of high density polyethylene have been produced under different moulding conditions. The mean densityϱ of each plaque together with its surface microhardnessVH have been measured. Polystyrene shows only a slight increase inϱ with increasing mould temperatureTm together with a reduced spread inϱ andVH values. In polyethylene, however,ϱ andVH both increase linearly withTm, giving a usefulVH againstϱ relation, which is attributed to increased percentage crystallinity.

Keywords

Polymer Polyethylene Polystyrene High Density Polyethylene Percentage Crystallinity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in to check access.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    A. Redner,Plast. Eng. Feb. (1987) 37.Google Scholar
  2. 2.
    R. G. Treuting andW. T. Read Jr,J. Appl. Phys. 22 (1951) 130.Google Scholar
  3. 3.
    “American Institute of Physics Handbook” (McGraw Hill Book Co., New York, 1972).Google Scholar
  4. 4.
    F. J. Balta Calleja, D. R. Rueda, R. S. Porter andW. T. Mead,J. Mater. Sci. 15 (1980) 765.Google Scholar
  5. 5.
    A. Zehavi andF. E. Filisko,J. Macromol. Sci. Phys. B21 (1982) 47.Google Scholar
  6. 6.
    R. F. Roe,J. Appl. Phys. 48 (1977) 4085.Google Scholar
  7. 7.
    I. G. Brown, R. E. Wetton, M. J. Richardson andN. G. Savill,Polymer 19 (1978) 659.Google Scholar
  8. 8.
    D. R. Rueda, F. J. Balta Calleja andR. K. Bayer,J. Mater. Sci. 16 (1981) 3371.Google Scholar
  9. 9.
    B. T. A. Chang andJ. C. M. Li,J. Mater. Sci. 15 (1980) 1364.Google Scholar
  10. 10.
    R. L. Ballman, T. Shusman andH. L. Toor,Mod. Plast. 37 (1959) 105.Google Scholar
  11. 11.
    I. M. Barrie,Plast. Polym. 37 (1969) 463.Google Scholar
  12. 12.
    M. R. Kamal andS. Kenig,Polym. Engng Sci. 12 (1972) 294.Google Scholar
  13. 13.
    J. L. Berger andC. G. Gogos,ibid. 13 (1973) 209.Google Scholar
  14. 14.
    J. L. White,ibid. 15 (1975) 44.Google Scholar
  15. 15.
    M. R. Kamal, Y. Kuo andP. H. Doan,ibid. 15 (1975) 863.Google Scholar
  16. 16.
    E. Broyes, C. Gutfinger andZ. Tadmor,Trans. Soc. Rheol. 19 (1975) 423.Google Scholar
  17. 17.
    J. F. Steven, A. Galsky, K. K. Wang, I. Chen andD. H. Reber,Polym. Engng Sci. 17 (1977) 666.Google Scholar
  18. 18.
    J. L. White andW. Dietz,ibid. 19 (1979) 1081.Google Scholar
  19. 19.
    A. I. Isayev andC. A. Hieber,Rheol. Acta. 19 (1980) 168.Google Scholar
  20. 20.
    B. L. Evans, To be published.Google Scholar
  21. 21.
    E. S. Clark,Plast. Eng. 30 (1974) 73.Google Scholar
  22. 22.
    M. R. Kantz, H. D. Newman andF. H. Stigale,J. Appl. Polym. Sci. 16 (1972) 1249.Google Scholar
  23. 23.
    V. Tan andM. R. Kamal,ibid. 22 (1978) 2341.Google Scholar
  24. 24.
    M. Fujiyama, H. Awaya andS. Kimura,ibid. 21 (1977) 3291.Google Scholar
  25. 25.
    M. Fujiyama andS. Kimura,ibid. 22 (1978) 1225.Google Scholar
  26. 26.
    M. Fujiyama andK. Azuma,ibid. 23 (1979) 2807.Google Scholar
  27. 27.
    S. Y. Hobbs andC. F. Pratt,ibid. 19 (1975) 1701.Google Scholar

Copyright information

© Chapman and Hall Ltd 1989

Authors and Affiliations

  • B. L. Evans
    • 1
  1. 1.J. J. Thomson Physical LaboratoryUniversity of Reading, WhiteknightsReadingUK

Personalised recommendations