Silicone elastomers phenyl

Some other silicon elastomers include vinyl silicone elastomers, phenyl silicon elastomers, nitrile silicone elastomers, and fluorosilicone elastomers. 

Flexible foams with oxygen index values of 40-53 were also prepared by the same authors from blends of copolymer IV and a silicone elastomer, (a phenyl vinyl polydimethylsiloxane) [592]. 

Silicone. Silicone elastomers have a siloxy backbone with methyl, vinyl, and phenyl groups attached. The elastomers are designated by their chemical composition, as follows methyl silicone (MQ), methyl vinyl silicone (VMQ), methyl phenyl silicone (PMQ), methyl phenyl vinyl silicone (PVMQ), and fluorovinyl methyl silicone (FVMQ). 

Poly(phenylene sulfone) (ISO NS) see also PSU Silicones with phenyl substituents (elastomer ASTM)... 

In these elastomers, 5—15% of the methyl groups of polydimethylsiloxane are replaced by phenyl groups to give materials with especially good low temperature properties. The relatively large phenyl groups reduce intermolecular forces and retard the tendency of the polymer to stiffen as the temperature is lowered. Thus dimethyl silicone elastomers lose their elasticity at about —50°C whereas phenyl silicones retain their elasticity at temperatures as low as —lOO C. 

Wurst O has described a gas chromatographic method using a gas density balance detector for the determination of chlorinated phenyl chlorosilanes. Separation is achieved on a column (2 metres x 4mm) packed with Celite 545 supporting 10% of Lukopren G 1000 (a Silicone elastomer), with nitrogen (60ml per minute) as carrier gas. The column was operated isothermally at various temperatures from 140 -... 

Silicone Elastomers. The main component of pressure-sensitive silicone adhesives is a silicone elastomer with a molecular mass of several 10 g/mol. There are two types One is neat poly(dimethylsiloxane) having very low Tg (-125 °C) [240] and critical surface tension. The other is modified by substitution of 5-15% of the methyl groups by phenyl groups. This results in higher Tg (ca. -86 C), higher surface tension, and improved heat stability [241],... 

An elastomer of the silicone family (see Silicones). It is a polyorganosiloxane, the backbone structure consisting of alternating silicone and oxygen atoms with organic groups, usually methyl, vinyl or phenyl radicals, attached to the silicon member. 

Phenyl(chloromethyl)dichlorosilanes and methyl(chlorophenyl)-dichlorosilanes are colourless, transparent, motile liquids, which fume in air. Like all organochlorosilanes, they are easily hydrolysed with water and humidity in air and dissolve well in organic solvents. Phenyl(chloromethyl)- and methyl(chlorophenyl)dichlorosilanes are raw stock for preparing various silicone liquids, elastomers, and polymers for varnishes. 

The First Commercial Era of Silicones, 1943-1960. The 45-year commercial history of silicones is easily divided into several eras. The period from 1943 to 1960 was dominated by the classical silicones, poly-(dimethylsiloxane) fiuids, elastomers, and simple methyl and phenyl resins. Basic monomer processes were developed during this period. 

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