Self-Assembly and Viscoelastic Properties of Semifluorinated Polyesters

• Published in: Macromolecular chemistry and physics Vol. 203; no. 5-6; pp. 854 - 861
• Main Authors: Gottwald, A., Pospiech, D., Jehnichen, D., Häußler, L., Friedel, P., Pionteck, J., Stamm, M., Floudas, G.
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag GmbH 01.04.2002; WILEY‐VCH Verlag GmbH; Wiley
• Subjects: Applied sciences; Exact sciences and technology; fluoropolymers; Organic polymers; Physicochemistry of polymers; polyesters; Properties and characterization; Rheology and viscoelasticity; self-assembly; structure; viscoelastic properties; PVT diagram; Isophthalate polymer; Viscoelasticity; Thermal transition; Fluorine containing polymer; Supramolecular structure; Ester polymer; Temperature effect; Hydrophobic group; Experimental study; Rigid chain; Lateral group
• ISSN: 1022-1352; 1521-3935
• DOI: 10.1002/1521-3935(20020401)203:5/6<854::AID-MACP854>3.0.CO;2-J

The structure and dynamics of polyesters composed from a rigid aromatic backbone and oxyalkylperfluoroalkyl side chains have been studied using differential scanning calorimetry, small‐ and wide‐angle X‐ray scattering, pressure–volume–temperature measurements and rheology. The system was found to undergo three phase transitions. Starting from lower temperatures they reflect the melting of the fluorinated side chains, the unfreezing of the backbone mobility and the melting of the smectic layered structure. In addition, rheology has shown that these compounds are thermorheologically complex at all temperatures investigated and exhibit non‐Newtonian low‐frequency response.