Electrorheological Toners for Electrophotography

Otsubo, Yasufumi; Suda, Yasuharu

doi:10.1006/jcis.2002.8510

Cited by 11 publications

(9 citation statements)

References 22 publications

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“…It is relevant to many fields, such as liquid insulators [3], lithography [4] and nanostructures [5]. In addition, electro-rheology is at present of increasing importance in the field of actuators and microactuators [6].…”

Section: Introductionmentioning

confidence: 99%

Electro-rheological description of liquid and solid dielectrics applied to two-phase polymers: a study of EPDM

Mocellini

2006

IEEE Trans. Dielect. Electr. Insul.

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A novel electro-rheological model for liquid and solid dielectrics is presented, which is well adapted to the purposes of engineering calculations. The study is focused in the frequency range of relaxation processes, well below the optical range. In addition, the dielectric material is considered to have only polarization charges, i. e. conduction charges are absent. The description for the energy transfer processes in dielectric materials is based on one-dimensional approximation using a rheological model with two-and three-parameter Voigt elements. The mean field approximation is adopted, considered as an averaging of the mechanical and electrical properties for the dipole and inter-dipole spaces. The continuity condition for mechanical and electrical forces is also taken into account. The model was applied to the study of ethylene-propylenedyene monomer (EPDM) commercial rubber having two phases, amorphous and semicrystalline. A good agreement was found with the experimental results from dielectric relaxation and dynamical mechanical measurements.

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Section: Introductionmentioning

confidence: 99%

Electro-rheological description of liquid and solid dielectrics applied to two-phase polymers: a study of EPDM

Mocellini

2006

IEEE Trans. Dielect. Electr. Insul.

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“…ELECTRORHEOLOGICAL studies facilitate predictive analysis in the field of engineering of materials under coupled mechanical and electrical stresses [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties and viscoelastic response in two-phase polymers

Mocellini

Lambri

Matteo

et al. 2008

IEEE Trans. Dielect. Electr. Insul.

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An electrorheological model is applied to results from Dynamic Mechanical Analysis in order to relate low-frequency dielectric properties to viscoelastic response. The model describes polymers with two phases at the mesoscopic scale, with polar groups embedded in one of the phases. Calculations use an electrorheological representation, based on the Voigt model, to describe the two phases. Low-frequency electrical and mechanical stresses are coupled through the permanent dipole moment of polar groups embedded in one of the phases. In the present model, low-frequency dielectric relaxation is calculated as the superposition of two Debye processes, corresponding to the interaction of the polar groups with the two phases. Induced polarization in the non-polar zones contributes only to highfrequency (relaxed) permittivity. The parameters of the relaxation processes are obtained from the electrorheological model using viscoelastic data from dynamic mechanical analysis. The model was applied to commercial EPDM (ethylene-propylene-diene monomer) employed as housing in electrical insulators rated at 33 kV. This rubber has two phases (amorphous and semi-crystalline), with polar groups embedded in the amorphous phase. Samples aged for 10 years in active transmission lines were studied, and compared with new samples. A good agreement was found between the calculated and measured dielectric spectra, within the low-frequency range where the model is applicable.

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“…However, changing the thickness and distribution of columns is hard in the uniform electric fields. In previous studies, [14][15][16] we have found that ER effect of suspensions is enhanced by the use of electrodes with a various striped patterns of conductive lines and spaces. From the observation by the naked eye, the particles aggregate along the conductive lines and no particles remain in the insulating region.…”

Section: )mentioning

confidence: 88%

Electrorheological Behavior of Suspensions between Pattern Electrodes with Fine Projections

Hirose

2015

J. Soc. Rheol., Jpn

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Electrorheological Toners for Electrophotography

Cited by 11 publications

References 22 publications

Electro-rheological description of liquid and solid dielectrics applied to two-phase polymers: a study of EPDM

Electro-rheological description of liquid and solid dielectrics applied to two-phase polymers: a study of EPDM

Dielectric properties and viscoelastic response in two-phase polymers

Electrorheological Behavior of Suspensions between Pattern Electrodes with Fine Projections

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