Surface and dielectric properties of oriental lacquer films modified by UV-curable silicone acrylate
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In order to achieve an oriental lacquer (OL) film with a thick consistency, UV-curable silicone acrylate (SA) was added to OL by a dual curing process. The addition of 5 wt% UV-curable SA to the OL formulation enabled the preparation via a single drying step of a 77 μm-thick film exhibiting excellent surface properties. FTIRATR was used to investigate the effect of UV-curable SA on the behavior of film formation during curing, and the relaxation behavior of the produced films was investigated by dielectric spectroscopy. Dielectric properties were measured in the frequency range 10−2–105 Hz at various temperatures between −100 and 200 °C. The results demonstrated that OL modified by UV-curable SA has a higher glass transition temperature and stronger secondary relaxation at a lower temperature than the conventional OL system. The OL film modified with UV-curable SA was presumed to be harder at the surface and tougher than conventional OL film.
Keywordsoriental lacquer silicone acrylate dielectric properties surface properties UV-curable
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