Besides, the dosage of initator also can affect solidify rate, ordinary control is in the dosage of initator 3% the left and right sides, because be like initator excessive, criterion itself also will absorb ultraviolet light, make the ultraviolet light radiate that reachs film ground floor decreases greatly thereby, bring about solidify speed to reduce. In coloured system, weaker wavelengh range is drawn to UV in dye inside, the absorption that should be smooth initator as far as possible peak, also can raise the solidify rate of UV solidify system so.
The research direction of 1.3 smooth initator
Combine both advantage, can will freedom radical and cation smooth initator coordinate jumbly system, can raise the solidify rate of coating so, mix BBP and MI like the person such as RajamaniNagavajan use [15] , experimental result makes clear, to system of a lot of solidify, be like EXPOXY(epoxy resin) etc, can raise their solidify rate.
Another kind of method is to use freedom radical - freedom radical is double solidify system, it is to point to what include two kinds of above in aggregate process to initiate a process [16] , freedom radical smooth solidify - freedom radical heats up aggregate department is a kind among them, although the solidify process of smooth solidify system is initiated by light, the deepness of solidify of 1) of a few defect that Dan Guanggu changes a system to also have as follows is restricted;(2) to use;(3) shadow part hard in coloured system cannot solidify, the appearance of solidify object is restricted. These defect also restricted the application of in some way of smooth solidify system, use double solidify system below these circumstances accordingly [17] , among them a phase is to pass smooth solidify reaction, and another level has through dismal response, dismal response includes to heat up reaction of solidify, damp solidify, oxidation solidify or solidify of oxygen of be disgusted with to wait. Can use light to solidify makes the system finalizes the design quickly or achieve “ to express dry ” so, and use dismal response to make part of “ shadow ” or bottom fraction solidify complete, achieve ” of “ get right on the job thereby, double solidify expanded smooth solidify system is between opaque medium, on the base material with more complex form, the application in exceeding thick coating and coloured coating.
2 monomer
The classification of 2.1 monomer
In radiation solidify, monomer is having very main effect. From the point of the reaction function of monomer, monomer can be divided for active monomer and blame active monomer [18-19] , by how many of monomer functionality, can divide monomer of the functionality that it is sheet, double functionality monomer, 3 functionality monomer and much functionality monomer again.
2.1.1 odd luscious monomer
Odd functionality monomer basically has attenuant effect in the system, it is right of smooth initator deliquescent and also have dominant effect to the flexibility of solidify film, this kind of monomer includes vinyl monomer and acrylic ester commonly, but their solidify speed is more luscious monomer is slow.
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