Electrorheology and characterization of acrylic rubber and lead titanate composite materials

✍ Scribed by N. Tangboriboon; A. Sirivat; S. Wongkasemjit

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 370 KB
• Volume: 22
• Category: Article
• ISSN: 0268-2605
• DOI: 10.1002/aoc.1388

✦ Synopsis

Oxide one-pot synthesis was used to synthesize a polymer precursor to lead titanate, PbTiO 3 . Perovskite lead titanate, PbTiO 3 , was synthesized via the sol-gel process. The dielectric constant, electrical conductivity and loss tangent of our acrylic rubber (AR71)-lead titanate (PT) composite material (AR/PT 8) were 14.15, 2.62 × 10 -7 / m, and 0.093, respectively, measured at 27 • C and 1000 Hz. SEM micrographs of composites between the AR71 elastomer and PbTiO 3 showed that the particles were reinforced within the matrix. The electrorheological properties of the AR71/PT composites were investigated as functions of electric field strength from 0 to 2 kV/mm and PbTiO 3 particle volume fraction. The storage modulus increased linearly with particle volume fraction, with or without an electric field. Without an electric field, the particles merely acted as a filler to absorb or store additional stress. With the electric field on, particle-induced dipole moments were generated, leading to interparticle interactions, and thus a substantial increase in storage modulus. With PbTiO 3 particle volume fractions as small as 10 -4 embedded in the elastomer matrix, the modulus increased by nearly a factor of 2 as the electric field strength varied from 0 to 2 kV/mm.