SURFACE-COMPOSITION OF FLUORINATED POLY(AMIDE URETHANE) BLOCK-COPOLYMERS BY ELECTRON-SPECTROSCOPY FOR CHEMICAL-ANALYSIS

The surface composition and near-surface depth profiles of annealed fi lms of poly(amide urethane) block copolymers were measured using angle -dependent electron spectroscopy for chemical analysis (ESCA). Segrega tion of the fluorinated polyamide soft segment to the surface was dete cted and quantified. The poly(amide urethane)s were made from amine-te rminated polyamides with N-alkylated fluorinated side chains as well a s fluorinated backbones, methylenebis(cyclohexandiyl diisocyanate) (H- 12-MDI), and butanediol.(1) The resulting copolymers display extremely low surface energy. A deconvolution program was utilized to obtain co mposition-depth profiles and to confirm phase segregation.