2006•Zhongguo Shiyou Daxue xuebao. Ziran kexue banRequires access
Measurement of rheological properties of linked polymer solution by different viscometers
WU Zhao-liang
Open publisher page 1 citations
Abstract
The viscosity of solution in the reactive process of low concentration and high molecular weight partially hydrolyzed polyacrylamide(HPAM) and aluminum citrate(AlCit)cross-linking system were determined by Ostwald capillary viscometer,dynamic viscometer and HAAKE RS150 rheometer.The relationship between viscosity of HPAM/AlCit cross-linking system and shear rate was investigated for different reaction time.The experimental results show that the viscosity of HPAM/AlCit cross-linking system decreases with reaction time in lower shear rate and the system represents shear-thickening property after period of reaction time in higher shear rate.The linked polymer solution is formed by intramolecular cross-linking of HPAM and AlCit forming linked polymer coil(LPC) in lower concentration of the system,which is the reason for the viscosity of HPAM/AlCit cross-linking system decreasing with reaction time and shear-thickening.