What is the hydrolysis degree of polyacrylamide sulfonated polymer?

Using this alkaline post hydrolysis method, we obtained partially hydrolyzed polyacrylamides with hydrolysis degree of 45%, and 56% and hydrolyzed sulfonated polyacrylamides with hydrolysis degree of 9%, 10%, 13% and 17%. 2.7. Infrared (IR) spectra of polymers The drop preparation method was used in the IR analysis.

Can nitrogen digestion determine the concentration of polyacrylamide-type polymers?

Conclusions The nitrogen digestion method is an effective way for determining the concentration of polyacrylamide-type polymers, including partially hydrolyzed polyacrylamide, sulfonated polyacrylamides, and cationic polyacrylamides.

Does IR spectroscopy determine hydrolysis degree of polyacrylamides?

Determination of hydrolysis degree of polyacrylamides by IR spectroscopy The determination of the components of acrylamide (AM) and acrylic acid (AA) using IR spectroscopy was well documented (Guerrero et al., 1985; Yuan et al., 1987 ).

Does hydrolysis affect the nitrogen content of polyacrylamides?

Fig. 9 shows the variation of nitrogen content as a function of polymer concentration from 100 ppm to 1000 ppm of partially hydrolyzed polyacrylamides with the hydrolysis degrees of 30%, 45%, and 57%, respectively. Also, the experimental results show that the nitrogen contents of high HD polyacrylamides are lower than that of low HD ones.

What are the peaks of partially hydrolyzed polyacrylamide?

Infrared spectra of partially hydrolyzed polyacrylamides with different hydrolysis degrees. The arrows indicate the two peaks of AM (1671 cm −1) and AA (1568 cm−1) and the red dash lines indicate the top of the peaks. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)

How to calculate nitrogen content in partially hydrolyzed polyacrylamide?

In principle, the nitrogen content in partially hydrolyzed polyacrylamide can be expressed as following (3) C N = C p ∗ ( 1 − H D) ∗ M N / ( M A A ∗ H D + ( 1 − H D) ∗ M AM) where M N, M AA and M AM are the molecular weight of nitrogen atom, the molecular weight of acrylamide acid and the molecular weight of acrylamide respectively.