Diazosulfonate polymer complexes: Structure and wettability

Polymeric complexes were prepared by using acrylate based copolymers, which contained 20, 30, 50, and 100 mol % diazosulfonate groups and a commercial ly available fluorinated surfactant (Fluorad FC135). The glass transition t emperatures of the complexes were determined to be 71 +/- 3 degrees C, this was independent of the amount of diazogroups. All these complexes are stab le up to temperatures of about 200 degrees C. As determined by wide- and sm all-angle X-ray diffraction, the solid states of the complexes in the bulk material were determined to be smectic A-like structures with long periods of 3.8-4.4 nm. Ultrathin films with thicknesses in the range 4-40 nm were p repared by spin coating. The wetting behavior of the films was found to be independent of their thickness. As determined by automatic drop shape analy sis of the contact angle measurements, the surface energies of complex film s were in the range 10-14 mN/m.