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Effect of Thermal History on Rheological Properties of partially hydrolyzed polyacrylamide/Anionic Surfactant SDS Complex Systems

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Chinese Chemical Letters 2002年第5期13卷 456-459页

作者： Hual Tian BU Zhen Zhong YANG Li HUANG Statc Key Laboratory of Polymer Physics and Chemistry Center for Molecular ScienceInstiturc of ChcmnistryChunese Acadcmy of SciencesBeijing 100080 Daqing Exploralion and Development Rescarch Institutc Daqing 163712

The effects of thermal history on the rheological properties of partially hydrolyzed polyacrylamide/ sodium dodecyl sulfate complex aqueous solutions have been studied using both steady shear and dynamic temperature sweep characterizations. An abnormal rheological behavior was found that dynamic moduli of the aqueous solutions increased, while the viscosity decreased after thermal treatment, which could help to gain insight into the micro-phase evolution of the polymer/surfactant complex aqueous solutions and its dependence on temperature.

关键词： partially hydrolyzed polyacrylamide Rheological properties Sodium dodecyl sulfate Supramolecular structure Thermal history

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Oxidation of partially hydrolyzed polyacrylamide from Polymer Flooding Processes Using Fenton Reagents

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China Petroleum Processing & Petrochemical Technology 2023年第4期25卷 86-92页

作者： Li Jinlian Wang Jia Liu Hongyan Wu HongJun Zhang Yongjun Provincial Key Laboratory of Oil&Gas Chemical Technology College of Chemistry&Chemical EngineeringNortheast Petroleum UniversityDaqing 163318China China National Petroleum Corporation Daqing Chemical Research CenterDaqing 163714China

The degradation of partially hydrolyzed polyacrylamide(HPAM) found in alkaline/surfactant/polymer flooding sewage was investigated using Fenton-type reagents. Different Fenton reagent treatments for HPAM degradation were compared. The effects of pH, hydrogen peroxide(H_(2)O_(2)), ferrous ion(Fe^(2+)), and tartaric ion(C_(4)H_(4)O_(6)^(2-)) concentrations were studied. The degradation reaction occurred within a wide range of pH(3–9). The HPAM degradation performance of photo-Fenton processes using solar light and UV were compared with that of the Fenton process. The degradation rate was found to be strongly dependent on the H_(2)O_(2)/Fe^(2+)/C_(4)H_(4)O_(6)^(2-)molar ratio. The HPAM degradation efficiency was 90%, and the chemical oxygen demand removal efficiency was 85%. HPAM could be degraded into a compound with a lower molecular weight, but it was difficult to achieve complete mineralization to CO_(2). The presence of intermediate products hindered further oxidation in the Fenton process.

关键词： photodegradation UV Fenton reagent partially hydrolyzed polyacrylamide

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Deformation of Linked Polymer Coils

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Chinese Journal of Chemical Engineering 2003年第6期11卷 686-690页

作者：董朝霞李明远吴肇亮林梅钦 Enhanced Oil Recovery Research Center University of PetroleumBeijing 102249China

Linked polymer solution (LPS) is defined as the solution of linked polymer coils (LPCs) dispersed in water, composed of low concentration partially hydrolyzed polyacrylamide (HPAM) and aluminum citrate (crosslinker). In the work, the conformational changes of LPCs under different conditions were investigated by the methods of membrane filtering under low pressure, dynamic light scattering and core flooding experiments. The results showed that in some conditions the LPCs could be compressed mechanically to 1/158.5 of their original volume because of relatively lower HPAM cross-linking. The hydration property of LPCs was similar to that of normal polymer coils. The deformation of LPCs was more restricted than that of ordinary polymer coils under the flow shear stress or the shift of hydration equilibrium caused in the variation of the electrolyte concentration which is responsible for the effective plugging in the throats of porous media when LPCs are used for deep diverting.

关键词： partially hydrolyzed polyacrylamide linked polymer solution coil deformation

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