Mechanisms of the adhesion between poly（p-phenylene sulfide）［PPS］and epoxy resin are investigatedby using molecular dynamics（MD）calculations. Amorphous cell models are constructed forPPS and epoxy resin. A possible oxidized structure of PPS after plasma treatment is also consideredto study roles of surface modification. Structures of the adhesion interface are obtained after MDsimulations. Van der Waals force works as a primary force between untreated PPS and epoxy resin,while electrostatic interaction is very weak. Oxygen-containing polar groups of PPS strengthens theelectrostatic interaction between PPS and epoxy resin, which efficiently enhances the binding energyof the adhesion interface. Breaking mechanisms of the adhesion interface are investigated by stepwiseseparations of the interface. Adhesive forces are theoretically calculated by the derivative of theenergy-displacement curves. Computational results clearly show that the interfacial biding and adhesiveforce are enhanced by the introduction of functional groups of PPS.

Solid state polymer electrolytes based on the nanostructured block copolymers including the conventional ionic liquid which have different alkyl chains were prepared. The site selectivity of ionicliquids in the nanostructured polymer matrix has been investigated by thermal properties and ionicconductivity. The glass transition temperatures of polymer electrolytes showed interesting behaviorby adding suitable ionic liquids. Owing to the high affinity of the ionic liquids which have long alkylchain for hydrophobic polymer, the PnBA phase of block copolymers was selectively plasticized by 1-Decyl -3-methylimidazolium bis（trifluoromethanesulphonyl）- imide. This site selectivity results thatthe improvement in ionic conductivity by adding suitable ionic liquids.