Preparation, mechanical and electric properties of polypropylene fiber reinforced lead zirconate titanate flexible materials.

The preparation and properties of polypropylene fiber (PPF) reinforced lead zirconate titanate (PZT) flexible materials were investigated in this paper. PPF reinforced PZT composites were prepared by hot pressing. The microstructure, mechanical and electrical properties of PPF reinforced PZT composited were tested by Scanning Electron Microscope (SEM) technology, Universal tester, d₃₃ quasi-static tester and LCR tester and were systematically characterized. The results showed that with the increase of PPF volume fraction, the reticular structures in the composites increase, and the bending strength σ_c and tensile strength σ_b of the composites increase; meanwhile, the relative dielectric constant ε_r and dielectric loss tanδ of the composites decreased gradually, but the piezoelectric strain constant d₃₃ of the composite increases first and then decreases with the increase of PPF volume fraction. When the PPF volume fraction is 50%, the composite has superior mechanical properties and comprehensive electrical properties, and is relatively in mechanical electrical equilibrium with σ_c is 25.402 MPa, σ_b is 7.049 MPa, ε_r is 77.216 and d₃₃ is 15 pC N⁻¹. [ABSTRACT FROM AUTHOR]