cation/anion/nonion polyacrylamide/cation/anion/nonion in brazil

cation/anion/nonion polyacrylamide/cation/anion/nonion in brazil
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  • Why does cationic polymer adsorption increase at pH 5?
  • For this reason at higher values of pH the electrostatic forces are more beneficial for the cationic polymer adsorption at pH 7 whereas in the case of anionic polyacrylamide the adsorbed amount increases at pH 5. Adsorbed amounts of AN PAM 30% and CT PAM 35% on the montmorillonite surface at pH 5 and 7
  • How to determine cationic polyacrylamide concentration spectrophotometrically?
  • The absorbance originating from the white colour of solution, indicating PAM-hyamine complex formation, was measured at the wavelength 500 nm after 15 min of the hyamine addition. The cationic polyacrylamide concentration was determined spectrophotometrically using the brilliant yellow as the indicator.
  • Why is cationic fragment structure important in a template copolymer?
  • The cationic fragment structure in the template copolymer could help to generate large and dense floc structure and form stable drainage channels. Under external pressure, these large and compact floc structures had greater compressive resistance, which avoided deformation and blockage of drainage channels and voids.