Interfacial dilational viscoelastic properties of polyacrylamide solutions

Abstract

The change of interfacial viscoelasticity along with measuring time, the effect of polymer concentration and the type of polymer on interfacial viscoelasticity at the interface between polymer and dodecane were investigated by means of dilatational method. Moreover different viscoelasticity at different interfaces for polymer solution was also found. The result shows that the response of interfacial adsorption process can be made by interfacial viscoelasticity. Elasticity plays an important role in polymer/dodecane system even though contribution of viscosity in viscoelasticity goes up along with the increase of polymer concentration. Among those three interfaces, numerical value of viscoelasticity at polymer/air interface is the largest one, numerical value of viscoelasticity at polymer/dodecane interface the second, numerical value of viscoelasticity at polymer/crude oil interface the smallest. In addition, measurement of interfacial rheology is a useful method to evaluate polymer solution.

Keywords

polyacrylamide / interfacial viscoelasticity / dilational method / dodecane

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