us4171296a – method of hydrolyzing polyacrylamide – chemicals

us4171296a – method of hydrolyzing polyacrylamide – chemicals
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  • What is thermal stability of water soluble polyacrylamide (PAM) and partially hydrolyzed polymers?
  • Thermal stability of water-soluble polyacrylamide (PAM) and partially hydrolyzed polyacrylamide (HPAM) polymers under various solution conditions have been studied utilizing Quantum Mechanics Density Functional Theory (DFT) computational modeling method.
  • What is copper-catalyzed controlled polymerization of acrylamide?
  • Copper-catalyzed controlled polymerization of acrylamide (AM) has always been a challenge, which typically exhibits low monomer conversion and broad molecular weight distribution (MWD) or requires complex/multistep reaction procedures, due to the highly active nature of the AM radical and its side reactions.
  • Can a dangling amide group be hydrolyzed to form an acrylic acid?
  • The dangling amide group of the PAM polymer could be hydrolyzed to form an acrylic acid that is subject to the easier interaction with cations. Chemistry regarding the amide hydrolysis is very rich and has been considered as an important modeled reaction for the enzymatic cleavage of peptide bonds , , .
  • How do cations affect the hydrolysis of Pam/HPAM polymers?
  • These cations not only can form complexes (gels or precipitates) with the carboxylic groups with HAPM to alter their rheological and phase properties, they can also catalyze the amide hydrolysis reaction to increase the degree of hydrolysis of PAM/HPAM polymers.