Rheological properties of salt-tolerant HPAM solutions with ultrahigh molecular weight  

作　　者：张敏革 张吕鸿 姜斌 李鑫钢 

机构地区：[1]School of Chemical Engineering and Technology,Tianjin University [2]National Engineering Research Centre for Distillation Technology

出　　处：《Journal of Central South University》2008年第S1期93-97,共5页中南大学学报（英文版）

基　　金：Project(07JCZDJC02600) supported by the Natural Science Foundation ofTianjin,China

摘　　要：The rheological properties of salt-tolerant partially hydrolyzed polyacrylamide(HPAM)solutions with molecular of 2.5×107 g/mol at different concentrations were measured in steady-state shear flow mode by Haake Rheostress 150 rheometer.Three constitutive equations(Oldroyd four constant model,Guesekus model and FENE-P model) were used for describing the apparent viscosity and first normal stress difference.The apparent viscosity of salt-tolerant HPAM solutions appears a first Newtonian zone when the shear rate is approximately lower than 0.2 s-1.At high shear rate,the HPAM solutions show shear-thinning and elasticity.The results show that the FENE-P model has the best agreement between theoretical and experimental data within the available shear rate range.The material parameters are useful for numerical analysis of polymer solution flow fields.The rheological properties of salt-tolerant partially hydrolyzed polyacrylamide (HPAM)solutions with molecular of 2.5×107 g/mol at different concentrations were measured in steady-state shear flow mode by Haake Rheostress 150 rheometer. Three constitutive equations (Oldroyd four constant model, Guesekus model and FENE-P model) were used for describing the apparent viscosity and first normal stress difference. The apparent viscosity of salt-tolerant HPAM solutions appears a first Newtonian zone when the shear rate is approximately lower than 0.2 s?1. At high shear rate, the HPAM solutions show shear-thinning and elasticity. The results show that the FENE-P model has the best agreement between theoretical and experimental data within the available shear rate range. The material parameters are useful for numerical analysis of polymer solution flow fields.

关 键 词：SALT-TOLERANT partially hydrolyzed POLYACRYLAMIDE STEADY-STATE flow shear THINNING FENE-P model 

分 类 号：O633.22[理学—高分子化学]