Study On Synthesis, Photocuring And Thermal Degradable Property Of Cycloaliphatic Diepoxides

Cycloaliphatic epoxies have drown much attention by the electronic packing materials. With smaller of the of line width and the higher integration of integrated circuit, as well as the high technology content of the industry, there are more strict requirements to the performances of the package materials, for example, the short curing time, heat resistance, little hygroscopicity, low cost, colorlessness, little ion and impurity. With the development of the semiconductor device, It shows many advantages in the microelectronic and optoelectronic field. Firstly, compared with the badness of the epoxides prepared from epichlorohydrin, the chlorine-free preparation process of cycloaliphatic epoxide avoids the demolishment to the microcircuit that chlorine would do. Secondly, the fact that there was no aromatic group in the molecular of cycloaliphatic epoxide endowed the resin with the capacity to resist the ultraviolet and the carbonization caused by the arc. Additionally, the comparatively low viscosity meets the demand of the packaging industry of integrated circuit.Besides, with the growing PC computer, there was serious pollution of the chips. It was high time studying the reworkable epoxy to build a green society. The photocrosslink epoxy stands more contribution due to the UV-photocrosslink technology. In this paper, fore cycloaliphatic epoxide was synthesized, all of them were chloro-free, benzene-free epoxide with low viscosity. The curing time were considerably short, the gel content and degradable temperature were high showing good prospect in the electronic packaging materials.Radical addition reaction, etherification and epoxidation reaction were used to synthesize several new diepoxide monomers. Their chemical structures were confirmed through IR spectra and ~1H-NMR spectra. RTIR was used to study the curing process; TGA was measured to evaluate the degradable property of the polymer. The utter aim was to find simple synthesis method, good yield monomer with fast curing rate and modest degradable temperature. From this systematic study we can conclude that cycloaliphatic epoxy was excellent environmental protect electronic material with fast curing rate and modest degradable temperature.