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

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 

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Copyright information

© Chapman and Hall Ltd 1989

Authors and Affiliations

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

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