Hydrothermal Ageing of Glass Fibre Reinforced Vinyl Ester Composites: A Review

The use of glass fibre-reinforced polymer (GFRP) composites in load-carrying constructions has significantly increased over the last few decades. Such GFRP composite structures may undergo significant changes in performance as a consequence of long-term environmental exposure. Vinyl ester (VE) resins are a class of thermosetting polymers increasingly being used in such structural composites. This increasing use of VE-based GFRPs in such applications has led to an increasing need to better understand the consequences of long-term environmental exposure on their performance. The reliable validation of the environmental durability of new VE-based GFRPs can be a time- and resource-consuming process involving costly testing programs. Accelerated hydrothermal ageing is often used in these investigations. This paper reviews the relevant literature on the hydrothermal ageing of vinyl ester-based GFRP with special attention to the fundamental background of moisture-induced ageing of GFRP, the important role of voids, and the fibre-matrix interface, on composite mechanical performance.

Automated summary

The use of glass fiber-reinforced polymer (GFRP) composites in load-carrying constructions has increased significantly in recent decades. Vinyl ester (VE) resins are being increasingly used in these structural composites, and their long-term environmental exposure consequences need better understanding. Testing the environmental durability of new VE-based GFRPs is time-consuming and costly, and accelerated hydrothermal aging is often used. This paper reviews the literature on hydrothermal aging of VE-based GFRP, focusing on moisture-induced aging, voids, and the fiber-matrix interface on composite mechanical performance.