Polyacrylamide and its derivatives for oil recovery

Table 2 
Experiment conditions for the Hydrophobic Modified of Poly-(acrylamide-
co
-
octadecylacrylamide). 
Sample 
AM
(mol.-%) 
C18AM 
(mol.-%) 
Conversion 
Solubility 
PAM 
100 
0 
71.2% 
Easily 
Soluble 
C18 (0.5%) 
99.5 
0.5 
81.6% 
Semi 
cloudy 
solution 
C18 (1%) 
99 
1 
83.7% 
Cloudy 
solution 
C18 (2%) 
98 
2 
86.7% 
Cloudy 
solution 
C18 (4%) 
96 
4 
86.5% 
Difficult to 
dissolve 
Total monomer concentration = 5 wt.-%; [AIBN] = 0.1wt.-% of monomer; T=85°C. 
The solubility of the products are not good as the products made by 
polymerization with water as solvent for monomers. The reason could be: (1). 

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hydrophobic out layer of the particle; (2). Water-free system made amide group hard to 
hydrolyze. 
3.2. Structure and Thermogravimetric Analysis 
 
Fig. 5. 
Foruirer transfer infrad (FTIR) spectra of octadecylacrylamide, acrylamide and 
poly-(acrylamide-
co
- octadecylacrylamide).
 
The structures of monomers, octadecylacrylamide, acrylamide and co-polymers of 
them were confirmed by FTIR spectroscopy, see Figure 5. In the spectra of 
octadecylacrylamide, the bands at 3304 cm
-1
, 1545 cm
-1
and 1254 cm
-1
were attributed to 
the N-H; The absorption at 1655 is due to the stretch vibration of C=O. For acrylamide, 
the absorptions at: 3336 cm
-1
, 3195 cm
-1
absorptions reflect vibrations of N-H;

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128 
(a)
(b)
(c)