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.

How to predict long-term stability of polyacrylamide-type polymer under high temperature and salinity?

A facile model was developed by TGA method for long-term stability prediction of polyacrylamide-type polymer under high temperature and high salinity conditions. Polyacrylamide-type polymers with good thermal stability present good long-term stability at high temperature and high salinity conditions.

Do polyacrylamide-type polymers have good thermal stability?

Polyacrylamide-type polymers with good thermal stability present good long-term stability at high temperature and high salinity conditions. Viscosity reduction of polyacrylamide-type polymers with good thermal stability was owing to polymer main chain degradation at harsh conditions.

Can thermogravimetric analysis predict long-term stability of polyacrylamide-type polymers?

This study aims to apply thermogravimetric analysis technology to develop a facile way for long-term stability prediction of polyacrylamide-type polymers at high temperature and high salinity reservoir conditions, to maintain sufficient viscosity in chemical flooding.

Why are polyacrylamide-type polymers limited to high temperature and salinity?

However, many polyacrylamide-type polymers are limited for reservoirs with high temperature (above 90 ℃) and high salinity (above 50,000 ppm), as they are susceptible to losing viscosity due to chemical and thermal degradation in aqueous environment , , , .

Does hydrolyzed polyacrylamide have a better viscosification power than amps-rich polymer?

A viscosity model we recently developed is applied for comparing the viscosifying power of hydrolyzed polyacrylamides (HPAM) with a AMPS-rich polymer (SAV10). The latter presents a better salinity tolerance, especially when divalent cations are present and a better viscosifying power in temperature.