Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

Structure-property relationships in glass reinforced polyamide, part 2: The effects of average fiber diameter and diameter distribution

Thomason, J.L. (2007) Structure-property relationships in glass reinforced polyamide, part 2: The effects of average fiber diameter and diameter distribution. Polymer Composites, 28 (3). pp. 331-343. ISSN 0272-8397

[img]
Preview
PDF (strathprints005798.pdf)
Download (220Kb) | Preview

    Abstract

    We present the results of an extensive study of the influence of average fibre diameter and the width of the diameter distribution on the performance of injection moulded glass-fibre reinforced polyamide 66. In the average fibre diameter range from 9-18m dry-as-moulded (DaM) composite unnotched impact and tensile strength decreased significantly. The composite notched impact performance and tensile modulus showed little dependence on fibre diameter. The influence of broadening the fibre diameter distribution by blending glass fibre samples of different average diameter was found to be particularly negative on the level of composite unnotched impact when compared at equal number average diameter. After hydrolysis treatment the composite tensile strength and modulus exhibited a large drop compared to the DaM results. In contrast, the unnotched impact results became insensitive to fibre diameter after hydrolysis. The average level of unnotched impact after hydrolysis was sufficiently high to show an increase over DaM when the fibre diameter was above 14m. Residual fibre length correlated significantly with fibre diameter with a lower average length for thinner fibres. The interfacial shear strength was found to be in the range of 26-34 MPa for DaM composites. There was a highly significant inverse correlation between the DaM interfacial strength and the average fibre diameter. It is shown that results from both tensile and unnotched impact measurements can be brought back to single trend lines by using a Z average value for the average fibre diameter which is more heavily weighted to the thicker fibres in the distribution.

    Item type: Article
    ID code: 5798
    Keywords: polymer composites, polyamide, glass, materials science, Mechanical engineering and machinery
    Subjects: Technology > Mechanical engineering and machinery
    Department: Faculty of Engineering > Mechanical and Aerospace Engineering
    Related URLs:
      Depositing user: Strathprints Administrator
      Date Deposited: 03 Apr 2008
      Last modified: 17 Mar 2012 05:31
      URI: http://strathprints.strath.ac.uk/id/eprint/5798

      Actions (login required)

      View Item

      Fulltext Downloads: