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(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.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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(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.
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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