Probing the association behavior of poly(ethylene glycol)-based amphiphilic comb-like polymer in NaCl solution.
The effect of salt on the associative behavior of intramolecular aggregates obtained from poly(ethylene glycol)-based amphiphilic comb-like polymers in aqueous medium at pH 6.2 has been investigated by surface tension, fluorescence probe, dynamic light-scattering, and viscometry techniques. Results reveal that the addition of salt screens the electrostatic repulsion between the charges along the polymer backbone in the aggregates and consequently (1) reduces the surface activity at the air/water interface, (2) leads to the contraction of the polymer backbone, and (3) reduces the hydrodynamic sizes of the aggregates. In contrast, the hydrophobicity of the aggregates remains unperturbed.
Basak
P
P
Materials Science Group, Inorganic and Physical Chemistry Division, Indian Institute of Chemical Technology, CSIR, Hyderabad 500007, India.
Nisha
C K
CK
Manorama
S V
SV
Maiti
Souvik
S
Jayachandran
K N
KN
D009994:Osmolar Concentration; D011092:Polyethylene Glycols / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D012965:Sodium Chloride; D012996:Solutions; D055672:Static Electricity; D013501:Surface-Active Agents / Q000737:chemistry*
D011108:Polymers; D012996:Solutions; D013501:Surface-Active Agents; D011092:Polyethylene Glycols; D012965:Sodium Chloride