Fluorine-containing polymers properties

Fluorine-containing polymers such as teflon are chemically and thermally particularly resistant. These surfaces also exhibit good nonstick properties, making them ideal materiab in many areas in home and industry. 

Considerable attention has also been devoted to the preparation of fluorine-containing polymers because of their unique properties and high-temperature... 

Fluorine-containing polymers exhibit unique chemical and physical properties and high performance that are not observed with other organic polymers. They possess high thermal stability, high chemical stability, a low coefficient of friction, low adhesion, water and oil repellency, low refractive index, and outstanding electric insulation. In addition, there have recently been new expectations of selective permeability, piezoelectricity, and biocompatibility. 

Engineering thermoplastics, 10 168-228 categories of, 10 169, 170-171t chemical resistance of, 10 224, 225t considerations for selecting, 10 220-222 costs of, 10 222-223 electrical properties of, 10 223 fluorine-containing polymers,... 

General Physical Properties of Selected Fluorine-Containing Polymers... 

Table 6.7 contains physical properties of selected fluorine-containing polymers described above. 

The fluorine-containing polymers for materials with complete internal light-reflection are reviewed. The general kinetic control features for the synthesis of block polymerisation fluoroalkylmethacrylates (FMA), their copolymerisation with different vinyl monomers, their relative activity and the polymerisation of FMA in presence of nitroxyl radicals are discussed. The basic properties of the more frequently used FMA for materials with complete internal light-reflection, are characterised. The new optical transparent fluorine polymers, also containing per-fluorinated cyclobutane and aromatic fragments are reviewed. Data from the literature and original results are presented. 

Structure, length of hydrocarbon chain, location [26] and amount of fluorine atoms in fluoroalkyl radical significantly affect properties of appropriate methacrylic polymer (see Table 8.9). Increasing the content of fluorine atoms in the polymer, increases the chemoresistance, thermo- and heat resistance and water absorption decreases. It should be noted that the fluorine atom in the ro-position in fluoroalkyl radical leads to a decrease of the surface tension, which is also the the reason for poor adhesion of the fluorine-containing polymer to the core and water absorption. In the a-position, the heat resistance and other properties of polymers obtained on this basis are presented in Table 8.10 [25]. 

The chemical nature of the base polymer is an important aspect in membrane development. There has been preference for the thermally stable fluorinated polymers over hydrocarbon polymers. Fluorine-containing polymers, characterized by the presence of carbon-fluorine bonds, are widely used as the base matrices owing to their outstanding chemical and thermal stability, low surface energy, and the ease of modiflcation of various properties by the grafting method. Per fluorinated polymers and partially fluorinated polymers combining hydrocarbon and fluorocarbon structures are excellent candidates as base polymers. For instance, fluorinated FEP has drawn wide attention due to its reasonably good radiation stabiUty [58]. 

Electrical insulation n. Material with very low conductivity, which surrounds active electrical devices. Common electrical insulation chemicals are fluorine-containing polymers. Dissado LA, FothergUl CJ (eds) (1992) Electrical degradation and breakdown of polymers. Institution of Electrical Engineering (lEE), London. Ku CC, Liepins R (1987) Electrical properties of polymers. Hanser Publishers, New York. 

In recent years, considerable attention hcis been devoted to the preparation of fluorine-containing polymers due to their unique properties and high-temperature performance. The incorporation of fluorine atoms (or groups containing fluorine atoms) into polymer chains changes solubility of polymers, glass transition temperature (T ) and thermal stability, while also led to decreased moisture absorption and dielectric constant. The aromatic fluoropolymers have currently been used as films, coatings microelectronics devices [37,55-60]. 

New Concepts in Emulsion Polymers Fluorine Containing Polymers Electro- and Electrooptic Properties of Macromolecules Fiber Spinning and Drawing... 

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