Influence of the polarization enhanced by barium strontium titanate and their surface modified fillers in the organic-inorganic composites of polyurethane based polycarbonate diol

Abstract

The concept of making composite has been conducted to improve the polarization of polyurethane (PU) based polycarbonate diol. Barium strontium titanate (BST), lead-free ceramic with high dielectric and piezoelectric coefficient, was synthesized. To improve the compatibility of BST in PU composites, hydrogen peroxide and 3-aminopropyl trimethoxysilane were used to modify the BST surface. The organic-inorganic composite was synthesized using a prepolymer method by varying types of filler. BST create the physical interaction with PU while modified BST create the chemical interaction with PU in composites. The highest dielectric constant was found in the organic-inorganic composite with surface modified BST.