What is partially hydrolyzed polyacrylamide (phpam)?

Partially hydrolyzed polyacrylamide (PHPAm) obtained from partly converting the amide groups to carboxylates by alkaline hydrolysis is a polymer that contains a large number of amide groups and a certain or controlled amount of carboxyl side groups on its macromolecular chains.

What is anionic polyacrylamide (Apam)?

1. Introduction Anionic polyacrylamide (APAM) is a kind of organic high-molecular polymer with high hydrophilicity and viscosity, which is easily dissolved in water [, , ].

What is HPAM polymer?

HPAM is a synthetic polymer consisted of straight chains of acrylamide monomers some of which has been hydrolyzed. A typical property of polymers used in the Chemical Enhanced Oil Recovery (CEOR) is their shear thinning (pseudoplastic) behavior. This feature allows these polymers to be injected without excessive pressure drop.

Do hydrophobic and anionic polymers interact strongly with membranes?

Hydrophobic, nonionic polymers are known to interact strongly with these membranes, (70) while anionic polymers generally show very low association. (8) It is assumed that the use of anionic, hydrophobic polymers which may possess both properties leads to the phenomenon of slow membrane integration.

Are polyanions hydrophobic compared to poly(acrylic acid) fibroblasts?

Remarkably, the determined p Ka -values for all synthesized polyanions are very similar to those of poly (acrylic acid) (p Ka = 4.5), despite detectable differences in hydrophobicity. Interactions between amino-acid-derived polyanions with L929 fibroblasts reveal very slow cell association as well as accumulation of polymers in the cell membrane.

What is the pH response of Leu-OH-aam-6af polymer?

P (Leu-OH-AAm)-6AF: Mn,app = 10,500 g mol –1; Đ = 2.11. The pH response of the different polymers was investigated by acidic titration. A 5 mg mL –1 solution of the polymer in deionized water was prepared and 20 μL of 1.0 M aq. NaOH was added to obtain a starting pH value >11.