The Effect Of New Type Photoinitiator On Dielectric Properties Of Ultraviolet Crosslinked Polyethylene

As a new type of insulating material, the ultraviolet light crosslinkingpolyethylene of high voltage grade has been extensively studied in the field ofinsulation. Because of ultraviolet crosslinking technology had a series ofadvantages, such as low production cost, equipment operation and maintenanceconveniently, as well as the production process was no harm to the environmentand so on, made it expected to make up for the shortcomings of traditionalcrosslinked cable production technology in the field of high voltage electricpower cable and high voltage submarine cable. The dielectric properties ofultraviolet light crosslinking polyethylene that adding new photoinitiator werestudied in this article, the purpose was to test the basic dielectric properties ofultraviolet light crosslinking polyethylene that was caused by new typephotoinitiator. It is thus clear that, this topic can provides a theoretical basis forultraviolet light crosslinking polyethylene cable of high voltage grade whether asan engineering applications.In this artical, a method of comparison study was adopted. Firstly, for thebase resin, macromolecular photoinitiator and crosslinked agent, this article donea theoretical research, this paving the way for the next experiment and theoreticalanalysis. In this theoretical basis, the ultraviolet irradiation crosslinkingexperiment of the basic resin of linear low density polyethylene that addingdifferent proportions of4-hydroxy diphenyl ketone lauric acid esterphotoinitiator and polyfunctional crosslinked agent was carried out in this artical.In the molten state, the transparency of linear low density polyethylene washigher, and the ultraviolet light can be good transmission, this made theirradiation crosslinked of thick sheet samples became possible. In addition, the heat extension performance of ultraviolet light crosslinking polyethylene sheetthat adding different proportion of photoinitiator were analyzed and compared inthis article, this determined the best adding proportion of the photoinitiator andcrosslinked agent. Then the crosslinking rate,and crosslinking temperature, aswell as irradiation time of ultraviolet light crosslinking polyethylene that addingnew type photoinitiator were studied. Finaly, a comparative analysis experimentswere carried on the dielectric properties of ultraviolet light crosslinkingpolyethylene and linear low density polyethylene.The studies found that the thickness of1mm sheet sample can be easilycrosslinked by adding the appropriate photoinitiator and crosslinking agent, itcan obtain perfect uniformity and high crosslinked degree in a short period oftime.