Premium
Tensions superficielles de copolymères méthacryliques perfluoroalkylés
Author(s) -
GueryRubio Claudine,
Viguier Michel,
Commeyras Auguste
Publication year - 1995
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1995.021960409
Subject(s) - copolymer , polymer chemistry , wetting , surface tension , surface energy , chemistry , methacrylic acid , contact angle , materials science , chemical engineering , polymer , thermodynamics , organic chemistry , composite material , physics , engineering
The surface properties of methacrylic copolymers with a random distribution of perfluoroalkyl pendent groups were studied by a tensiometric method and were found to depend on the concentration of fluorinated units (2‐hydroxy‐4,4,5,5,6,6,7,7,8,8,9,9,9‐tridecafluorononyl methacrylate ( 1 )), and the nature of the non‐fluorinated methacrylic ester (methyl, butyl, stearyl). The surface tensions estimated by various approaches (critical surface tension, geometric and harmonic mean approximations) are very low (11 mN · m −1 < y < 12 mN · m −1 ). The surface tension of the copolymers drops drastically when a few percent of fluorinated units are incorporated into the polymeric chain. The wetting hysteresis, observed particularly in the case of water, could be due to the mobility of macromolecular chains at the interface, leading to a reorganization of fluorinated groups in order to minimize the interfacial energy.