Question

How are linear silicones obtained?

Answer 1

Silicones have the general formula $(R_{2}SiO)_{n}[\tex] with [tex](R_{2}SiO-)$as the repeating units. They are organo silicon polymeric compounds contains the Si–O–Si linkages.

In order to manufacture silicones, the starting material may be alkyl or aryl substituted chlorides  

In order to produce straight or linear silicones

i) hydrolysis of dimethylchlorosilane. i.e. (CH3)2SiCl2  

ii) the hydrolysed product is followed by condensation

iii) the condensed product on polymerization yields straight chain or linear polymers.

Answer 2

Silicones have the general formula  as the repeating units. They are organo silicon polymeric compounds contains the Si–O–Si linkages.

In order to manufacture silicones, the starting material may be alkyl or aryl substituted chlorides  

In order to produce straight or linear silicones

i) hydrolysis of dimethylchlorosilane.i.e. (CH3)2SiCl2  

ii) the hydrolysed product is followed by condensation

iii) the condensed product onpolymerization yields straight chain or linear polymers.