The effect of ultraviolet (UV) light postcuring on resin hardness and interlaminar shear strength of a glass-fibre/vinylester composite
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Thermoset resins formulated with a photoinitiator can be rapidly cured through exposure to ultraviolet (UV) light. The UV light excites the photoinitiator, which breaks down to produce radicals that begin catalytic polymerisation of the resin . Cure can be achieved in minutes or seconds, depending on the light intensity, exposure time and resin thickness. For this reason, the use of UV curing resins is established in the coating and ink industries where it has increased productivity and reduced solvent emissions [2, 3].
In contrast, manufacturing processes for fibre-reinforced polymer-matrix composites are characterised by numerous processing stages, long cycle times and hazardous chemical emissions. Thermoset matrix resins are often catalysed with peroxide catalysts. These resins typically require a thermal postcure, after an initial room temperature cure, to increase properties to an acceptable level. This process takes several hours. Composites are attractive for increased use in...
KeywordsShear Strength Methyl Ethyl Ketone Peroxide Interlaminar Shear Strength Vinyl Ester Resin Pultrusion Process
- 9.Cvetanovska A, Compston P (2004) J Mater Sci 39:1791. doi: https://doi.org/10.1023/B:JMSC.0000016186.59458.a1 CrossRefGoogle Scholar