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Journal of Materials Science

, Volume 22, Issue 1, pp 46–56 | Cite as

The hygrothermal behaviour of glass fibre reinforced Pa66 composites: A study of the effect of water absorption on their mechanical properties

  • D. Valentin
  • F. Paray
  • B. Guetta
Papers

Abstract

A kinetic study of water absorption in three types of thermoplastic materials has been undertaken: pure Pa66 polymer, short fibre and continuous fibre composites. Ageing tests were carried out under nine sets of hygrothermal conditions: three different temperatures 40, 70, 90°C and three relative humidity levels, namely 30, 75 and 100% r.h. The results were found to obey a Fickian diffusion model and the characteristic parametersD (diffusion coefficient) andMm% (maximum moisture content percentage) were determined. The influence of water uptake on residual mechanical properties was studied using three-point bending tests. For each type of composite, a water concentration threshold was detected beyond which a significant reduction in mechanical properties was observed.

Keywords

Fibre Composite Short Fibre Ageing Test Humidity Level Content Percentage 
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.

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Copyright information

© Chapman and Hall Ltd. 1987

Authors and Affiliations

  • D. Valentin
    • 1
  • F. Paray
    • 1
  • B. Guetta
    • 1
  1. 1.Ecole Nationale Supérieure des Mines de ParisCentre des MatériauxEvry CédexFrance

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