|標題：Preparation and Characterization of Spironaphthooxazine/Polyacrylate Photochromic Hard Coatings on Plastic Substrates|
|作品名稱||Preparation and Characterization of Spironaphthooxazine/Polyacrylate Photochromic Hard Coatings on Plastic Substrates|
|著者||Chao-Ching Chang; Chih-Shing Wang; Yu-Chen Chen; Liao-Ping Cheng|
|著錄名稱、卷期、頁數||淡江理工學刊=Journal of Applied Science and Engineering 17(2), pp.167-174|
|摘要||Optical coatings exhibiting photochromic effects were prepared by UV-curing of a coating formulation that incorporates a hexa-functional monomer, DPHA, and an organic dye, spironaphthooxazine. Spectroscopic studies of the coatings indicated efficient photochromic activities in response to UV irradiation. The depth of color and the rate of bleaching at 610 nm were found to depend on the UV dosage and the dye content; specifically, the transmittance returned from 42 to 82%
and from 38 to 67% in 60 s. for the coating containing 3.7 wt% dye that received 0.45 and 3.6 of J/cm 2 of UV exposure, respectively. Furthermore, the coatings were very hard (7H, pencil hardness) and adhered perfectly (100%, peel test) on poly (methyl methacrylate) substrates.