Question

What are
silicons ? How
are silicon prepared?
state it's s uses.
​

Answer 1

Answer:

Silicones-They are a group of organosilicon polymers, which have (R

2

SiO) as a repeating unit. Preparation of Silicones-The starting materials for the manufacture of silicones are alkyl or aryl substituted silicon chlorides R

R

n

SiCI

4−n

,

, where R is alkyl or aryl group.

When methyl chloride reacts with silicon in the presence of copper as a catalyst at a temperature 570 K, various types of methyl substituted chlorosilanes are formed. Hydrolysis of dimethyl dichloro silane i. e., (CH

3

)

2

SiCl

2

followed by condensation polymerisation forms straight chain polymer i. e., silicone.

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