UV-radiation curing has become a well-accepted technology because of its distinct advantages mainly as environmental benign, efficiency, less energy consumption and mild curing condition. The free radical photopolymerizations have been based mainly on acrylate systems, which polymerize rapidly and can be adjusted with ease to modify materials with different properties for different applications. The primary limiting factor of the approaches, however, is that the reactions would be inhibited by oxygen. A main method to tackle the problem is to add tertiary amine. Nevertheless, this causes new problems in the curing products, which turn yellow easily and their deposited period becomes short.