Preparation and properties of Barium titanate (BaTiO₃) reinforced high density polyethylene (HDPE) composites for electronic application

In this study, 3-Aminopropyltriethoxysilane (KH550) with polar amino groups is applied to modify the surface of Barium titanate (BaTiO₃) particles. When volume fraction of BaTiO₃ further increases to 50 vol%, the dielectric constant and loss of HDPE control increase from 2.5 and 0.02 to 18.5 and 0.10 at 10 MHz, respectively, with the volume resistivity of HDPE control decreasing from 3.6 × 10¹³ Ω m to 3.5 × 10¹¹ Ω m. The increased amount of modified BaTiO₃ can increase the flexural strength and modulus HDPE composites from 8 and 90 MPa to 14 and 780 MPa, respectively. However, the increase of modified BaTiO₃ can restrict mobility of HDPE chains and decrease the crystallinity of HDPE composites.