Are hydrophobically modified polyacrylamides hydrolyzed?

In this work, a series of hydrophobically modified polyacrylamides and their hydrolyzed derivatives have been prepared via micellar polymerization at high monomer concentration (19 wt%) and post-hydrolysis. 1 H and 13 C NMR elucidation of polymer microstructures displayed a good agreement with feed ratio.

How to control acrylamide polymerization?

To conclude, the controlled polymerizations of acrylamide have been successfully achieved via a one-pot and one-step aqueous Cu (0)-mediated RDRP approach. It has been demonstrated that strong deactivation control is the key for the control in AM RDRPs.

What is polyacrylamide used for?

Polyacrylamide (PAM) is a collective term for polymers obtained by the homopolymerization or copolymerization of acrylamide monomers under the action of an initiator. It can be used as a coagulant, retention aid, sludge dewatering agent, and flocculant sedimentation agent, among other uses, and has a wide range of applications.

What are hydrophobically associating polyacrylamides (hapams)?

Of particular interest in this class are hydrophobically associating polyacrylamides (HAPAMs), derived from polyacrylamide by introducing a relatively low amount (generally less than 2 mol%) of hydrophobic pendent groups .

Which polyacrylamide is used as a catalyst?

By using methyl 2-chloropropionate (MeClPr) as the initiator and tris [2- (dimethylamino)ethyl]amine (Me 6 TREN)/copper halogenide (CuX) as the catalyst system, different linear polyacrylamides with apparent molecular weights up to >150 000 g/mol were synthesized with dispersities as low as 1.39.

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.