the effect of hyrolysis of polyacrylamide on solution in saudi arabia

the effect of hyrolysis of polyacrylamide on solution in saudi arabia
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  • How does pH affect polyacrylamide hydrolysis?
  • Muller et al. , proposed that polyacrylamides would hydrolyze under slightly acidic conditions (pH = 4), and reported that the molecular weight of the polymer remained relatively stable during hydrolysis. Thomas et al. , investigated the effects of different pH conditions and reaction times on the hydrolysis process.
  • Does polyacrylamide hydrolyze under acidic conditions?
  • As reported by Muller et al., polyacrylamides undergo hydrolysis under acidic conditions to yield poly (acrylamide-co-acrylic acid). Amide groups will completely hydrolyze under conditions of appropriately low pH, and polymer weight will remain relatively stable during hydrolysis, as the following formula , , .
  • Does HBR hydrolyze polyacrylamide?
  • It was also reported that HBr acts as a catalyst for the hydrolytic scission of amide bonds, resulting in a scission and MW chain reduction. Muller et al. , proposed that polyacrylamides would hydrolyze under slightly acidic conditions (pH = 4), and reported that the molecular weight of the polymer remained relatively stable during hydrolysis.
  • Does hydrolyzed polyacrylamide have a pH dependence?
  • They discovered that the viscosity of hydrolyzed polyacrylamide exhibits pH dependence as characterized by transition zones (at pH = 3 and pH = 6), where the viscosity suddenly changes. This is because the hydrogen ions adsorb and dissociate from the carboxyl functional groups, a discovery which has significant application potential , .