Silicone properties

K.F. Lee, T.J. Stultz, and James F. Gibbons, Beam Recrystallized Polycrystalline Silicon Properties, Applications, and Techniques... 

Liquid silicone rubber (LSR), 22 584 Liquid silicon, properties of, 22 484t Liquid soaps, 22 748 Liquid soil detergency, 8 422-423 Liquid—solid chromatography, adsorption, 1 610-611... 

Vortex-induced separator, 22 62-63 Vortex-induced vibration, 11 756 Vortex meters, mass flowmeters, 20 681 Vortex patterns, 11 755 Vortex precession meters, 11 668 Vortex shedding, 11 756 Vortex shedding meters, 11 668-669 Vortices, superconductor, 23 824-825 Voyage charters, 25 327 VP Sandoflam 5085, 11 491 V-type inks, 14 326 Vulcanizable silicone rubber, 25 129 Vulcanizable silicones, properties and applications of, 22 594-595, 596-597 Vulcanizates EPDM, 10 713 EPM/EPDM, 10 715 ethylene-acrylic elastomer, 10 698,... 

For cubic crystals, which include silicon, properties described by other than a zero- or a second-rank tensor are anisotropic (17). Thus, in principle, whether or not a particular property is anisotropic can be predicted. There are some properties, however, for which the tensor rank is not known. In addition, in very thin crystal sections, the crystal may have two-dimensional characteristics and exhibit a different symmetry from the bulk, three-dimensional crystal (18). Table 4 is a listing of various isotropic and anisotropic silicon properties. Table 5 gives values for the more common physical properties and for some of the thermodynamic properties. Figure 5 shows some thermal properties. 

Molten silicon is not a semiconductor, and has no commercial use, although because of the high heat of fusion, it has been considered as a heat storage medium. The liquid (molten) silicon properties summarized in Table 6 are nevertheless of importance because these affect single-crystal growth, an operation through which essentially all semiconductor-grade silicon must pass. 

Modification of thermoplastics or thermosets with precrosslinked poly(organosiloxane) elastic particles should impart impact strength as well as typical silicone properties, i.e., low temperature flexibility, stability against weathering, and improved chemical resistance [4]. 

Silicone Properties maintained from -75 to 260°C. Can be cold-cured. Fillers for increased strength. 

For textiles, the waterproofing properties of silicones are well known. Friction coatings that reduce slip for stockings tops and socks are examples of an innovative use of silicone properties. 

Summary Monofunctional silicone fluids and silicone organic copolymers are specialty products which offer the ideal supplement to today s standard silicones and polymers. By use of these materials, desirable silicone properties like certain surface effects are conferred onto organic systems, in most cases without compromising the convenient handling of the base formulations. 

Applications were proposed and developed with respect to the specific properties of the LC silicone properties. For all applications the solid state at RT, achieved by vitrification or chemical curing is essential. The required specific optical properties are a consequence of the LC phase. 

Silicone properties and uses have been discussed extensively (59,321—324). 

The filler then contributes to reinforcement, thixotropy, and bulk. Since most of the fillers are mineral-like inorganic materials, they generally don t add or detract from the intrinsic silicone properties for which the sealants are most often sold, such as good electrical insulating properties, weather resistance, heat stability and low temperature serviceability. Organic fillers (polymers, resins, rubbers) have been added to some silicones and indeed enhance certain properties or reduce cost but always at the expense of another property. The property most often sacrificed is thermal stability. 

There are other potential developments in the future for all the positive silicone properties. Certainly there is still a need for development in tensile strength, swelling resistance in oil and abrasion resistance. Price is rapidly becoming a major factor in all applications, and there is no... 

For more information see articles on Silicones properties. Silicone adhesion and specialized reviews on silicone and polysulphide sealants Sealants in double glazing are the subject of a separate article. 

Silicones are widely used in industry, for example, as adhesives, sealants and release agents see Silicone properties and Silicone adhesion. Silicone adhesives may cure by condensation or addition reactions. The former is considered here and the latter in Silicone adhesives addition cure (see also Step polymerization). 

In the quest for the ideal adhesive system to suit an application needs, it is essential to understand the effect of the silicone properties on the mechanisms of Silicone adhesion. The primary requirement for good adhesion is the creation of an intimate interface through Wetting and spreading of the silicone onto the substrate. The low surface tension and viscosity range of silicones satisfy this necessary condition. Therefore, the mechanical mechanism of adhesion is operative and plays a key role in adhesion of silicones to many different substrates such as leather, textile fabrics, porous metals like anodized aluminium, porous plastic and composite materials, and specialty papers like glassine, super calendered kraft and clay-coated papers. 

Related articles discuss Silicones properties. Silicone adhesives addition cure and Silicone adhesives condensation cure. 

Silicones properties B PARBHOO Range of properties Silicones structures B PARBHOO Chemical structure... 

Sealant joint design J C BEECH Design of butt and lap joints Sealants in double glazing G B LOWE Types of materials, durability Silicones properties B PARBHOO Range of properties... 

Irradiation with ions was used on monocrystalline substrates prior to anodization, in order to manage the porous silicon properties. This allows technique of 3D micromachining of silicon... 

Table 2 The porous silicon properties of selected explosive devices...

Basu S, Kanungo J (2011) Nanociystalline porous silicon. In Basu S (ed) Crystalline silicon - properties and uses. InTech - Open Access Publisher, Rijeka, Croatia. ISBN 978-953-307-587-7... 

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