rheological properties of ionic and nonionic polyacrylamide

rheological properties of ionic and nonionic polyacrylamide
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  • Why is nonionic polyacrylamide used as anti-scouring admixture?
  • Nonionic polyacrylamide was selected as anti-scouring admixture to eliminate the influence of different polymer electrical properties (Lu et al. 2025 ). The molecular weight of PAM is more than 10 million Daltons, and its main chain is connected with a C=O bond and an amino functional group as a branch chain structure, as shown in Fig. 2.
  • Does polyacrylamide affect aqueous solutions and fresh cement pastes?
  • In this paper, we study the effects of polyacrylamide (PAM) on both aqueous solutions and fresh cement pastes. Our solution viscosity and hydrodynamic radii measurements in various solutions suggest that calcium ions lead to a cross-linking of anionic PAM and to the formation of PAM micro-gels.
  • Can calcium ions cross-link polyacrylamide chains?
  • We measure the rheology of various aqueous ionic solutions containing polyacrylamide. We measure the hydrodynamic radii of polyacrylamide using DLS in various aqueous solvents. We suggest that calcium ions are able to cross-link polyacrylamide chains and form micro-gels. We measure adsorption isotherms of polyacrylamide on cement grains.
  • Can a high molecular nonionic polyacrylamide (PAM) be used as anti-washout admixtures?
  • In this article, underwater cement paste (UWP) was fabricated through using the high molecular nonionic polyacrylamide (PAM) as anti-washout admixtures (AWAs). The traditional coaxial rotary method was used to systematically investigate UWPs rheology parameters.