Study of dielectric properties in microwave frequency on irradiation HDPE/TiO_2 composites grafted by acrylic acid

The effect of HDPE/TiO_2 composites grafted by acrylic acid (AA) with different irradiation doses on the gel fraction, grafting rate, application frequency, and temperature were reported, the dielectric constant and dielectric loss tangent (tgδ) were studies for the composites in microwave frequency band. The results showed that the HDPE/TiO_2 composites irradiated were grafted simultaneously have higher dielectric constant (e′≈30) and lower dielectric loss tangent (tgδ≈3×10~(-3)), it was very important value for the microwave communication. On the other hand, the SEM micrographs of composite show that the interfacial interaction between HDPE and TiO_2 were network structure after composite irradiated and grafted by AA.