Abstract
An ultraviolet-curable polymeric blend was developed to serve as a coating for optical fibres. The composition of the system was 55.6 wt% urethane acrylate, 44.4 wt% epoxyacrylate, 1.5 wt% benzoin isopropyl ether and 25 wt% 1,3-butanediol diacrylate. Three different silane coupling agents were tested to improve the polymer-glass adhesion. The optical fibres were drawn at 0.45 m sec−1 using a CO2 laser; the ultraviolet curing blend was applied and cured with a xenon flash lamp. Ageing studied in water and in humid environments performed on these coated fibres showed that there was an increase in their strength compared to the silicone-coated fibres. It was possible to triple the fibre's drawing velocity without affecting the percentage conversion of the resin and the mechanical and optical properties of the fibre.
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