Ultraviolet (UV) light is usually defined as electromagnetic radiation in the range from 1 to 400 nm. Adhesives, surface coatings, and similar materials have been formulated to cure by irradiation with UV light, usually with a wavelength of greater than 300 nm. UV-curing adhesives and coatings have several advantages over alternative materials. They cure very rapidly, usually in a matter of seconds, are solvent free, and are more energy efficient than heat or infrared drying systems. They also have high adhesive strengths on almost all substrates. Blue light, with a wavelength around 450 nm, is most frequently used for curing highly filled dental restoratives.
The curing process can be monitored using oscillatory rheology. TA Instruments has developed Curing Accessories, designed to be used with the DHR-3, DHR-2, AR-G2, and AR 2000ex Rheometers. Most curable materials start as low to medium viscosity fluids. Upon being irradiated, they undergo either partial or full curing, usually in a matter of seconds. To follow this process rapid data acquisition is needed, and TA Instruments has developed fast sampling software for use with the Curing Accessories.
For additional information related to the EHP, refer to the following:
DHR/AR Series UV Curing Accessories Getting Started Guide
Operating the UV Curing Accessory
