Surface Composition of Fluorinated Poly(amide urethane) Block Copolymers byElectron Spectroscopy for Chemical Analysis

摘要

The surface composition and near surface depth profiles of solution-cast films ofpoly(amide urethane) block copolymers were measured using angle-dependent electron spectroscopy for chemical analysis (ESCA). Segregation of fluorinated polyamide soft segment to the surface was detected and quantified. The poly(amide urethane)s were made from amine-terminated polyamides with N-alkylated fluorinated side chains as well as fluorinated backbones, methylenebis(cyclohexane diisocyanate) H12MDI, and butanediol. The resulting copolymers display extremely low surface energy. Annealing of the solution-cast films drives the fluorinated side chains to the surface. A deconvolution program was utilized to obtain composition depth profiles and to confirm phase segregation. (AN).