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Fluoropolymers

Notes

from 12/06/2014 through 4/24/2012

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Coatings: Fluorinated

Fluoropolymer Applications

Fluoropolymer Materials

Fluoropolymer Polymerization

Polymers

Polytetrafluoroethylene (PTFE)

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Notes

“Fluoropolymers share the properties of fluorocarbons in that they are not as susceptible to the van der Waals force as hydrocarbons.  This contributes to their non-stick and friction reducing properties.  Also, they are stable due to the stability multiple carbon–fluorine bonds add to a chemical compound.  Fluoropolymers may be mechanically characterized as thermosets or thermoplastics. Fluoropolymers can be homopolymers or copolymers.” (Wikipedia, Fluoropolymers, 4/24/2012)

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“Fluoropolymers have properties such as extremely low coefficient of friction, wear and chemical resistance, dielectric strength, temperature resistance and various combinations of these properties that make fluoropolymers useful in numerous and diverse industries. For example, in the chemical process industry, fluoropolymers are used for lining vessels and piping. The biomedical industry has found fluoropolymers to be biocompatible and so have used them in the human body in the form of both implantable parts and devices with which to perform diagnostic and therapeutic procedures. In other applications, fluoropolymers have replaced asbestos and other high temperature materials. Wire jacketing is one such example. Automotive and aircraft bearings, seals, push-pull cables, belts and fuel lines, among other components, are now commonly made with a virgin or filled fluoropolymer component.

In order to take advantage of the properties of fluoropolymers, fluoropolymers often must be modified by decreasing their lubricity in order to be bonded to another material. That is because the chemical composition and resulting surface chemistry of fluoropolymers render them hydrophobic and therefore notoriously difficult to wet. Hydrophobic materials have little or no tendency to adsorb water and water tends to "bead" on their surfaces in discrete droplets. Hydrophobic materials possess low surface tension values and lack active groups in their surface chemistry for formation of "hydrogen-bonds" with water. In the natural state, fluoropolymers exhibit these hydrophobic characteristics, which requires surface modification to render it hydrophilic. The applications mentioned above all require the fluoropolymer to be modified.”

[Donckers, II; Nelson and Moon;, US Patent 8,132,747 (3/13/2012)]

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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* Date of latest addition; date of first entry is 4/24/2012.

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