Abstract

Composite specimens with epoxy matrix containing original and treated Ultra High Modulus Polyethylene (UHMPE) fibres as reinforcement, were immersed in distilled water and kept for 10 months at temperatures ranging from 20 to 60 °C. Testing of flexural properties and interlaminar shear strength showed that in general the hygrothermal treatment had a detrimental effect on those properties, with the exception of flexural modulus which tends to increase after immersion at 20°C for specimens of poor fibre/matrix interfacial bonding.

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