Synthesis of polysiloxane-grafted fluoropolymers and their hydrophobic properties

• Published in: Journal of applied polymer science Vol. 78; no. 11; pp. 1955 - 1963
• Main Authors: Suzuki, H., Takeishi, M., Narisawa, I.
• Format: Journal Article
• Language: English
• Published: New York John Wiley & Sons, Inc 09.12.2000; Wiley
• Subjects: Applied sciences; Chemical modifications; coating; Exact sciences and technology; fluoropolymer; grafting; Inorganic and organomineral polymers; Physicochemistry of polymers; polydimethylsiloxane; water-repellent; Terpolymer; Coating material; Graft copolymer; Vinyl ester copolymer; Hydrophobicity; Experimental study; Ring cleavage; Chemical coupling; Alcohol copolymer; Chemical modification; Preparation; Epoxide; Chloro trifluoro ethylene copolymer; Surface properties; Dimethylsiloxane copolymer
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/1097-4628(20001209)78:11<1955::AID-APP150>3.0.CO;2-H

A polydimethylsiloxane with an epoxide end group was grafted onto a fluoropolymer that had hydroxyl side chains by using protonic or Lewis acids as catalysts. Strong acids such as trifluoromethanesulfonic acid were found to be effective for the grafting of the polydimethylsiloxane of relatively large molecular weight (Mn 4440). A coating prepared from the graft polymer was so hydrophobic that a water droplet of 10 μL slid down on its inclined plane surface (30° with respect to the horizontal). ESCA analysis revealed that the siloxane branches are preferentially present on the surface. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 1955–1963, 2000