How are high molecular weight polyacrylamide nanoparticles prepared?

High molecular weight polyacrylamide nanoparticles were prepared by inverse-emulsion polymerization of aqueous acrylamide solution in xylene as a continuous phase under various conditions in the presence of a mixture of non-ionic emulsifiers (Tween 85 and Span 80).

What is P olyacrylamide (Pam) & its copolymers?

P olyacrylamide (PAM) and its copolymers are of important polymeric materials in petroleum industry, for example in drilling fluids and enhanced oil recovery. High molecular weights of these polymers are needed to have optimum efficiency in the above given applications.

How are hydrophobically modified polyacrylamides (HM-Pam) nanolatexes synthesized?

In this article, nine hydrophobically modified polyacrylamides (HM-PAM) nanolatexes, were synthesized by copolymerizing the acrylamide monomer and novel polymerizable surfactants (surfmers). The reaction was carried out by inverse microemulsion copolymerization technique.

What is water soluble hydrophobically modified polyacrylamide (hmpam)?

The water-soluble hydrophobically modified polyacrylamide (HMPAM) has been extensively investigated in the last thirty years. Research interest stems mainly from two areas: solutions and hydrogels. Interest in HMPAM solutions has arisen primarily from controlling viscosity at different shear rates (rheology) in many technologies.

What is a 1 H NMR spectra of polyacrylamide?

The 1 H NMR spectra of polyacrylamide (PAM), Poly (AM-co-OSA-eo22Ac) (PAM-Ia) and Poly (AM-co-O-OS-eo22Ac) (PAM-IIIa) are illustrated in Fig. 3 (a–c). The 1 H NMR spectrum (3a) shows chemical shifts between б (1) and (2.5) for 1 H protons (a) and (b) in –C H 2 and –C H of acrylamide units.

What is a high molecular weight Pam?

Depending on the reaction conditions, PAM particles with average particle sizes generally smaller than 200 nm in diameter and particle size distribution in the range of 50-400 nm and viscosity-average molecular weights as high as 8×10 6 g.mol -1 were obtained. Content may be subject to copyright. Synthesis and Characterization of High Molecular …