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Synthesis of Fluorinated Hyperbranched Polymers and Their Use as Additives in Cationic Photopolymerization

✍ Scribed by Marco Sangermano; Anna Di Gianni; Roberta Bongiovanni; Aldo Priola; Brigitte Voit; Doris Pospiech; Dietmar Appelhans

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
101 KB
Volume
290
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

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.

magnified imageSynthesis of fluorinated hyperbranched polyester.

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