Abstract
A new family of hydrophobically modified polyacrylamides (HMPAM) was synthesized via homogeneous copolymerization of acrylamide (AM) and anionic surface-active monomer of acrylamide-type, sodium 2-acrylamido-tetradecane sulfonate (NaAMC14S) in aqueous solution. The copolymers NaAMC14S/AM with microblock structures and with different chain microstructures were obtained by varying the copolymerization factors, such as the feed ratio of NaAMC14S to AM and the amount of added electrolyte NaCl and initiator. The interaction between copolymers NaAMC14S/AM and cationic gemini surfactants, C12C3C12Br2 and C12C6C12Br2, was studied by using viscosimetry and fluorescent probe technique. The results show this new family of HMPAM, NaAMC14S/AM, has very strong interaction with gemini surfactants, and their aqueous solutions exhibit unique rheological properties.
Acknowledgments
The authors are grateful to the Science Foundation of Province Shanxi of China for financial support of this work.
Notes
a Weight fraction of initiator K2S2O8 in the total feed.
b Aggregation number of NaAMC14S.
c Intrinsic viscosity (ml/g).