The reasonableness to determine the intrinsic viscosity according to this method depends on the assumption that the linear relationship between the reduced viscosity and concentration should be existed even in extremely dilute polymer solution.

The calculation of the thermal entrance region for the maximal drag reduction of dilute polymer solution;

A comprehensive review is given to the developments during the last ten years in research on mechanism of drag reduction of dilute polymer solutions in the paper.

In order to make the new model of gas solubility proposed by our previous work be applied to the dilute aqueous solutions, an internal pressure equation of water is established from the intermolecular potential function.

This dust suppressant is prepared from water-soluble polymer and starch by graft modification and catalytic oxidation.

Introducing hydrophobic groups to water-soluble polymers has significant effects on the property of the polymers, mainly the changing of the rheological property caused by the hydrophobic association among the hydrophobic groups in aqueous solutions.

A precision device based on the conductance millivolt input notation method, connecting an electrical conductometer to a recorder, and with a deviation of ±5％ is established for the determination of the rate of dissolution of water-soluble polymeric electrolyte.