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A study of dilational rheological properties of polymers at interfaces

Authors :
Yang Li
Alain Cagna
Shengxiang Jiang
Huanquan Sun
Xulong Cao
Lixia Dou
Source :
Journal of Colloid and Interface Science. 270:295-298
Publication Year :
2004
Publisher :
Elsevier BV, 2004.

Abstract

Viscoelastic properties of two polymers, partially hydrolyzed polyacrylamide and partially hydrolyzed modified polyacrylamide, widely used in chemical flooding in the petroleum industry, were investigated at three interfaces, water–air, water–dodecane, and water–crude oil, by means of a dilational method provided by I.T. Concept, France, at 85 °C. Polymer solutions were prepared in brine with 10,000 mg/l sodium chloride and 2000 mg/l calcium chloride. It has been shown that the viscoelastic modulus increases with the increment of polymer concentration in the range of 0–1500 mg/l at the water–air interface. Each polymer shows different viscoelatic behavior at different interfaces. Generally speaking, values of the viscoelastic modulus ( E ), the real part ( E ′), and the imaginary part ( E ″) at the crude oil–water interface for each polymer are lower than at the air–water or water–dodecane interface. The two polymers display different interfacial properties at the same interface. Polymer No. 2 gives more viscous interfaces than polymer No. 1. All the information obtained from this paper will be helpful in understanding the interfacial rheology of ultra-high-molecular-weight polymer solutions.

Details

ISSN :
00219797
Volume :
270
Database :
OpenAIRE
Journal :
Journal of Colloid and Interface Science
Accession number :
edsair.doi.dedup.....f3daf0490988045215a2a773e75fe96d