Polymer Technology
The rate controlling step in the manufacture of silicone rubber is the

Polymer termination step
Condensation of siloxane to silicone
None of these
Initial hydrolysis of silicone monomer

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Polymer Technology
Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to

Reduce the time of vulcanisation and quantity of vulcanising agent
Reduce its viscosity to permit easier processing
Increase its viscosity
Protect rubber goods from attack by oxygen & ozone present in the atmosphere

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