Joon-Seop Kim

Introduction to Ionomers

Structural Variability in Ionomers. Morphology of Random Ionomers. Glass Transitions in Random Ionomers. Styrene Ionomers. Partly Crystalline Ionomers. Other Ionomers. Plasticization. Ionomer Blends. Applications. Index.

The morphology of polyurethane grafts and blends

Abstract The object of this study was the exploration of the morphology of partly sulfonated polystyrenes containing polyurethane grafts and blends of similar composition by dynamic mechanical studies (DMTA) and electron microscopy (TEM). The synthesis of grafts was accomplished by stepwise grafting onto the partly sulfonated polystyrene of N-methyldiethanoloamine by way of ionic interactions resulting from proton transfer followed by chain growth on the hydroxyl sites of the polyurethane structures. In the dynamic mechanical study two glasstransition temperatures are observed for blends and for grafts with long soft segments of polyurethane, but in the TEM study even grafts with only hard segments of polyurethane are heterogeneous. Transmission electron microscopy is a more sensitive method for investigation of the morphology of polymer alloys.