Preparation For Phenyl Glycidyl Ether Acrylate And Study On UV-Curable Properties

UV-curable materials are usually consisted of prepolymers, diluents and photoinitiators. Bisphenol-A type epoxy acrylates and phenolic epoxy acrylate are commonly used as prepolymer, they have some advantages of high curing rate, high hardness of curing product, thermal stability and excellent corrosion resistance, however, also exist some disadvantages of high brittleness and poor toughness, especially the viscosity of which is very high, and must adding a lot of reactive diluent to adjust viscosity. Thus, UV-curable material will have a large smell, on the other hand, the current synthesis will result in increased costs. Therefore, it is necessary.to develop some prepolymers with moderate viscosity, and without adding diluents.This paper studies the preparation method of a new type of photosensitive prepolymers-phenyl glycidyl ether acrylate?PGEA?. The biggest feature of which is moderate viscosity, and can be directly cured with photoinitiator, it is very convenient. Moreover, the viscoelasticity of curing product is excellent, which can be used in specific areas that materials are required to have a higher tensile strength. The details of study are as follows:Firstly, PGEA was synthesized by Phenyl glycidyl ether?PGE? and acrylic acid?AA? as raw materials, and with triphenylphosphine as the catalyst, with 4-methoxy phenol as the inhibitor. Based on the research of various technical conditions during synthesis, it showed that the best reaction condition was that: the mole ratio of PGE and AA was 1:1.1,the content of triphenylphosphine was 0.8wt%, 4-methoxyphenol was 0.3wt%,the reaction temperature was 110 ?.Secondly, contrasted photoinitiator 1-hydroxy cyclohexyl phenyl ketone?UV184? and 2-hydroxy-2- methyl-1-phenyl acetone?UV1173? were added the photosensitive prepolymer PGEA, and formulated into two groups of UV curable coatings. By analyzing the mechanical property of UV-cured film, the result showed that the photoinitiator UV184 was more matching to the prepolymer whose optimal dosage was 4%.Besides, PGEA compared with bisphenol-A type epoxy acrylates?DH306?, found that UV-curing film of PGEA had a higher degree of cure, and mechanical properties, adhesion, water resistance and corrosion resistance were much more better.Finally, nano-SiO₂ which was treated by surface modification with cetyl trimethyl ammonium bromide and coupling agent with KH-570, added into photosensitive prepolymers PGEA to prepare UV hybrid coating. Scanning electron microscope?SEM? observation showed that when the content of modified nano-SiO₂ was less than 5%, which was be well dispersed in the UV-curing material system. Scanning atomic force microscope?AFM? observation showed that the surface of curing film is smooth. And the modified nano-SiO₂ in a appropriate amount could improve the tensile strength, elongation and impact strength of the UV-curing materials.