Noncontact dielectric friction

Article Abstract:

Dielectric fluctuations are responsible for the noncontact friction in high-sensitivity scanning probe microscopy of dielectric materials. The differences in measured friction among the polymers are described by relating electric field fluctuations at the cantilever tip to dielectric relaxation of the polymer.

Dielectrics, Dielectric materials, Properties

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Generalization of the friction theory for viscosity modeling

Article Abstract:

An important step forward for the friction theory (FT) is presented as the approach is extended to virtually all types of equation of state (EoS). This extension is achieved by the introduction of a rational method for splitting a given EoS into separated predominantly repulsive and attractive terms.

Chemical synthesis

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Ion bridging effects on the electroviscosity of flexible polyelectrolytes

Article Abstract:

An experimental study is carried out to investigate the effect of added salt on the viscosity and microstructure of sodium polystyrenesulfonate solutions. It is found that the viscosity order with respect to the valence of added cations changes, depending on the polymer and salt concentrations.

Electrolytes

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