Abstract
Technique of the preparation of the anhydride-terminated polyfluoroaromatic oligoimides from tetrafluorophenylene or hexafluoronaphthylene diamines and oxydiphthalic anhydride was elaborated. These compounds were used as modifiers and cohardeners for an epoxy-anhydride formulation composed of resin DGEBA and isomethyltetrahydrophthalic anhydride. Curing parameters of the modified epoxy-imide formulations were investigated using DSC, DMA, and FTIR spectroscopy. The modified epoxy polymers containing the polyfluoroaromatic imide fragments have improved thermomechanical and thermooxidative characteristics and hydrophobicity. The modifiers exert a positive effect on the elastic modulus, flexural strength, and dielectric permittivity of the epoxy-anhydride polymers when their amount reaches 20–30 pbw. The anhydride-terminated polyfluoroaromatic oligoimides appears to be promising for the preparation of epoxy polymers with improved performance.
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