351 / 2019-02-02 00:00:35

Space Charge Behavior of Gas-phase Fluorinated Epoxy Resin

epoxy resin, gas-phase fluorination, pulsed electroacoustic, charge accumulation

In this work, effects of gas-phase fluorination on the space charge behavior of epoxy resin were investigated. Gas-phase fluorination was carried out using a F2/N2 mixture with 20 vol.% F2 at 0.05 MPa and 40°C for different time duration. Fourier-transform infrared spectroscopy (FTIR) was employed for the chemical characterization of epoxy samples. The space charge behavior of the epoxy samples was observed before and after the gas-phase fluorination by Pulsed electroacoustic (PEA) method. PEA measurements indicated that 30 minutes fluorination is useful for reducing the space charge injection into epoxy resin. However, if the samples were fluorinated for a longer time e.g. 60 minutes, deep traps were created and large amount of space charges began to accumulate in the bulk of epoxy resin. Therefore, it can be concluded that adequate fluorination has a significant impact on space charge accumulation in epoxy resin.