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Synthesis of Fluorinated Hyperbranched Polymers and Their Use as Additives in Cationic Photopolymerization
Author(s) -
Sangermano Marco,
Di Gianni Anna,
Bongiovanni Roberta,
Priola Aldo,
Voit Brigitte,
Pospiech Doris,
Appelhans Dietmar
Publication year - 2005
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200500048
Subject(s) - photopolymer , cationic polymerization , materials science , polyester , carbocation , polymer , epoxy , polymer chemistry , surface modification , chemical engineering , organic chemistry , monomer , chemistry , composite material , engineering
Summary: A fluorine containing hyperbranched polymer was synthesized by modifying an aromatic‐aliphatic hyperbranched polyester with a semifluorinated alcohol via a Mitsunobu reaction and was subsequently used as an additive in cationic photopolymerization of an epoxy resin. The remaining OH groups of the fluorinated hyperbranched polymer interact with the polymeric carbocation through a chain‐transfer mechanism inducing an increase in the final epoxy conversion. The fluorinated HBP induces modification of bulk and surface properties, with an increase in T g and surface hydrophobicity already reached at very low concentration. The HBFP additive can, therefore, protect the coatings from aggressive solvents, increases hardness, and allows the preparation of a low energy surface coating.Synthesis of fluorinated hyperbranched polyester.