influence of polyacrylamide conformation on fabric in russia

influence of polyacrylamide conformation on fabric in russia
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  • What is polyacrylamide (PAM)?
  • Polyacrylamide (PAM) is a water-soluble synthetic polymer which possesses useful properties such as good adhesiveness, proper hygroscopicity, high hydrophilicity, and non-toxicity. PAM composites with CNCs can be obtained by mixing an aqueous solution of PAM and an aqueous suspension of CNCs. PAM is a carbochain polymer with a side amide group.
  • What is a conformation stimuli-response of an adsorbed polymer?
  • A conformation stimuli-response of an adsorbed polymer is not as immediate as the response of the polymer in a solution. The time required for reaching the equilibrium conformation depends on the binding energy between the polymer and the adsorbent surface, the surface coverage, and the polymer molecular weight.
  • What happens if Pam macromolecules adopt a globular conformation?
  • If PAM macromolecules adopt a globular conformation (at low pH), the compression of the polymer chains would increase the steric repulsive force between the polymer macromolecules, reducing the mechanical properties of the composites.
  • How does polymer chain compression affect the re-dispersibility of Pam/CNC composites?
  • If no bridging is possible (PAM globule conformation at pH ≤ 3), the compression of the polymer chain increases the steric repulsive force between the polymer-adsorbed surfaces, preventing aggregation of the CNC particles and providing good re-dispersibility of the freeze-dried PAM/CNC composites. 3.9.