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Synthesis and solution properties of poly(acrylamide‐styrene) block copolymers with high hydrophobic content
Author(s) -
Shaikh Sohel,
Ali Sk. Asrof,
Hamad Esam Z.,
AbuSharkh Basel F.
Publication year - 1999
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.11589
Subject(s) - copolymer , hydrophobe , materials science , aqueous solution , styrene , pulmonary surfactant , chemical engineering , polymer chemistry , polymer , polyacrylamide , acrylamide , micelle , pyrene , chemistry , organic chemistry , composite material , engineering
Hydrophobically associating block copolymers of polyacrylamide/styrene with a high hydrophobe content were synthesized using micellar copolymerization under various conditions of surfactant and initiator concentrations with the objective of determining the conditions that produce optimum solution properties for enhanced oil recovery. Solubilities, aqueous solution viscosities and interfacial properties with air and oil of the copolymers were investigated. The influence of salt on the solution properties was also studied. Nature of hydrophobic sites and onset of hydrophobic association were studied by measuring the fluorescence of pyrene in polymer solutions. Optimum solution properties were obtained for copolymers synthesized under conditions of high surfactant and initiator concentrations. The copolymers displayed substantial thickening properties at low concentrations with enhanced thickening in the presence of salt. The interfacial tensions of the aqueous solutions with n‐decane and air were also reduced. Interfacial properties were slightly sensitive to salt concentration. The copolymer solutions showed shear and temperature thinning behaviors typical of polymer solutions.