| Abstract
| - The adsorption behavior of poly(styrene-b-isoprene) (PS-b-PI) copolymers functionalized with polarsulfobetaine zwitterionic groups at different positions along the backbone was investigated. Using dilutesolutions in toluene, adsorption onto gold surface was investigated using a quartz crystal microbalance(QCM). ZwIS and ZwSI, ZwISZw, and SZwI are PS-b-PI copolymers functionalized at the α-position(zwitterionic group is attached to isoprene or styrene), at the α,ω-positions, and at the junction-point inthe chain, respectively. The copolymers showed interesting adsorption behavior according to the zwitterionposition. The adsorption isotherms for the copolymers exhibited typical Langmuir isotherm behavior. Theyshowed different adsorbing amounts, which was explained by possible conformational states of copolymerson the surface. It was found that the position of zwitterionic groups has a major role on adsorption kineticsdespite similar molecular weight and composition for the copolymers.
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