Water-soluble grafted sodium polyacrylate with low concentration: Synthesis and thermal properties
Wang T. Kang W. Yang H. Li Z. Fan H. Zheng W. Zhu T. Aidarova S. Gabdullin M.
1 January 2022Elsevier B.V.
Journal of Molecular Liquids
2022#345
The “graft onto” method is used to obtain the “stimuli-responsive water-soluble polymer” with low concentration, where 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and n-hydroxysulfosuccinimide sodium salt as catalyst and sodium polyacrylate as backbone chain. The molecular structure of the polymer is characterized by Nuclear Magnetic Resonance (1H NMR). The influence of temperature on polymer rheological properties and aggregation is studied by rheometer and fluorescence probe respectively. The results show that when the polymer concentration is higher than 1500 mg/L, the thickening properties can be controlled by diacetoneacrylamide, thermal-responsive monomer, NaCl and polymer concentration, where the apparent viscositymax/ viscositymin (ηmax/ηmin) changes from 18.3 to 39.4, from 2.6 to 45.5, from 9.3 to 36, from 7.8 to 36.9 respectively and the lower critical solution temperature (LCST) changes from 60 °C to 40 °C. The reason for the polymer with controllable thickening properties is that the thermal-responsive monomers change from hydrophilicity to hydrophobicity, thus forming aggregations. At this time, the polymer chains form network structures. Because of controllable thickening properties at low concentration, it has potential application prospects.
Aggregation , Controllable thickening properties , Low concentration , Mechanism , “graft onto” method
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Key Laboatory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao, 266580, China
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, China
Petroleum Engineering Technology Research Institute, Shengli Oilfield, SINOPEC, Dongying, 257000, China
Shengli Oilfield Company Postdoctoral Research Station, SINOPEC, Dongying, 257000, China
Kazakh-British Technical University, Almaty, 050000, Kazakhstan
Key Laboatory of Unconventional Oil & Gas Development
School of Petroleum Engineering
Petroleum Engineering Technology Research Institute
Shengli Oilfield Company Postdoctoral Research Station
Kazakh-British Technical University
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