Premium
Electrorheology and characterization of acrylic rubber and lead titanate composite materials
Author(s) -
Tangboriboon N.,
Sirivat A.,
Wongkasemjit S.
Publication year - 2008
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.1388
Subject(s) - composite material , lead titanate , dielectric , composite number , elastomer , natural rubber , volume fraction , titanate , electric field , particle (ecology) , dissipation factor , materials science , permittivity , modulus , dynamic mechanical analysis , lead zirconate titanate , chemistry , ferroelectricity , polymer , ceramic , oceanography , physics , optoelectronics , quantum mechanics , geology
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 /Ω 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. Copyright © 2008 John Wiley & Sons, Ltd.