Polyelectrolyte complex formed from diazoresin(DR) as cationic polyelectrolyte and alkaline hydrolysate of styrenemaleic anhydride copolymer(PSMNa) as anionic polyelectrolyte does not dissolve in water or organic solv...Polyelectrolyte complex formed from diazoresin(DR) as cationic polyelectrolyte and alkaline hydrolysate of styrenemaleic anhydride copolymer(PSMNa) as anionic polyelectrolyte does not dissolve in water or organic solvents due to its ionic crosslinking structure. It was found that the solubility of this complex was greatly enhanced in aqueous solution of sodium dodecyl sulfate(SDS). The solubility of DRPSMNa complex in 0.1 mol/L and 0.15 mol/L SDS aqueous solution was determined to be 0.024 g/mL and 0.033 g/mL respectively. It was also confirmed that the complex from DR and SDS, which does not dissolve in water, can also dissolve in SDS aqueous solution. The decomposition temperature(T d ) of diazonium groups for different complexes was determined by DSC and shows that the T d of DRPSMNa after dissolution in SDS aqueous solution changes to 146 ℃ from the original value of 133 ℃. It was proposed that during the dissolution of PEC in surfactant aqueous solution, the complex is separated to its two components via the interaction between PEC and surfactant molecules at first, then the components dissolve in water.展开更多
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Polyelectrolyte complex formed from diazoresin(DR) as cationic polyelectrolyte and alkaline hydrolysate of styrenemaleic anhydride copolymer(PSMNa) as anionic polyelectrolyte does not dissolve in water or organic solvents due to its ionic crosslinking structure. It was found that the solubility of this complex was greatly enhanced in aqueous solution of sodium dodecyl sulfate(SDS). The solubility of DRPSMNa complex in 0.1 mol/L and 0.15 mol/L SDS aqueous solution was determined to be 0.024 g/mL and 0.033 g/mL respectively. It was also confirmed that the complex from DR and SDS, which does not dissolve in water, can also dissolve in SDS aqueous solution. The decomposition temperature(T d ) of diazonium groups for different complexes was determined by DSC and shows that the T d of DRPSMNa after dissolution in SDS aqueous solution changes to 146 ℃ from the original value of 133 ℃. It was proposed that during the dissolution of PEC in surfactant aqueous solution, the complex is separated to its two components via the interaction between PEC and surfactant molecules at first, then the components dissolve in water.
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.
