Synthesis and performance evaluation of temperature-resistant and salt-resistant hydrophobic associative polymer

Polyacrylamide polymer (RDTA) was prepared from free radical aqueous solution polymerization of acrylamide (AM), hydrophobic monomer allyl group dodecylamine and amphoteric polymerizable ionic surfactant (H-66), and characterized by 1HNMR, 13CNMR, FTIR and MS. The association performance of RDTA in different solutions and the relationship between the association behavior and temperature were further investigated through apparent viscosity, SEM, and rheological properties tests. The results indicated that the critical association mass fraction of RDTA was between 0.25% and 0.30%. The stimulation effect of salt ions on RDTA polymer chains could enhance the structural viscosity of the molecular chain. Moreover, the elastic modulus increased with the increment of RDTA mass fraction, and the solution system exhibited elasticity, resulting in a denser spatial structure. Under shear conditions of 170 s–1 and temperatures of 70, 90 and 120 ℃, RDTA salt solution with a mass fraction of 0.5% (using mass fraction of 6% NaCl as solvent) showed a shear time of © 2024 Fine Chemicals. All rights reserved.