The interactions of sulfonated polystyrene (SPS) and cetyl trimethylammonium bromide (CTAB) have been investigated with methyl orange (MO) as spectral probe. The increasing of the solution viscosity is related closely...The interactions of sulfonated polystyrene (SPS) and cetyl trimethylammonium bromide (CTAB) have been investigated with methyl orange (MO) as spectral probe. The increasing of the solution viscosity is related closely with the presence of hydrophobic domain, which forms through the interaction between the polymer chains and CTAB molecules. The viscosity of the solution reaches two maximums at the molar ratio of CTAB:SPS [-SO 3Na unit]=～0.5 and ～1.5, which are consistent well with two hydrophobic domains appearing in solution at the same ratios. In the case of higher concentration of SPS(>0.04?mol/L), at a specific ratio of CTAB/SPS, the solution will convert to a gel due to crosslinking formed from the aggregation of CTAB molecules in micelles with SPS polymer chains.展开更多
文摘The interactions of sulfonated polystyrene (SPS) and cetyl trimethylammonium bromide (CTAB) have been investigated with methyl orange (MO) as spectral probe. The increasing of the solution viscosity is related closely with the presence of hydrophobic domain, which forms through the interaction between the polymer chains and CTAB molecules. The viscosity of the solution reaches two maximums at the molar ratio of CTAB:SPS [-SO 3Na unit]=～0.5 and ～1.5, which are consistent well with two hydrophobic domains appearing in solution at the same ratios. In the case of higher concentration of SPS(>0.04?mol/L), at a specific ratio of CTAB/SPS, the solution will convert to a gel due to crosslinking formed from the aggregation of CTAB molecules in micelles with SPS polymer chains.
