(iii) The molecular weight of polydimethylsiloxane can be controlled by addition of a silicon-based reagent. Suggest the identity of this reagent and explain its effect on the polymerisation reaction. (iv) The properties of polydimethylsiloxane can be changed by the altering the degree of branching of the polymer chains. A silicon-based reagent can be added to promote chain branching during polymerisation. Suggest the identity of this reagent and explain how it promotes chain branching.
(iii) The molecular weight of polydimethylsiloxane can be controlled by addition of a silicon-based reagent. Suggest the identity of this reagent and explain its effect on the polymerisation reaction. (iv) The properties of polydimethylsiloxane can be changed by the altering the degree of branching of the polymer chains. A silicon-based reagent can be added to promote chain branching during polymerisation. Suggest the identity of this reagent and explain how it promotes chain branching.
Chapter31: Synthetic Polymers
Section31.1: Chain-growth Polymers
Problem 1P: Order the following monomers with respect to their expected reactivity toward cationic...
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Transcribed Image Text:(iii) The molecular weight of polydimethylsiloxane can be controlled by addition of
a silicon-based reagent. Suggest the identity of this reagent and explain its
effect on the polymerisation reaction.
(iv) The properties of polydimethylsiloxane can be changed by the altering the
degree of branching of the polymer chains. A silicon-based reagent can be
added to promote chain branching during polymerisation. Suggest the identity
of this reagent and explain how it promotes chain branching.
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