A novel chemical modification of triblock copolymers of hydrogenated poly(styrene block butadience block styrene)(SEBS) was developed leading to a new kind of carboxylated SEBS ionomer. The behavior of hydrophilic association of sulfonated SEBS ionomers with different counterions in nonpolar solvent was studied by viscometry and dynamic light scattering (DLS) presenting quantitative measurements of the associated aggregates. Meanwhile

the behavior of the complexation between the sulfonated SEBS ionomers and pyriding-containing random coploymers both in dilute solution and in bulk was evidenced by an abnormal increase of the viscosity and Tg.Finally

it was found that slightly carbpxylated SEBS ionomers could form stable colloidal dispersion in water due to stabilization of the ionic groups on the surface of the hydrophobic particles.