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How is the degree of polymerization of the polymer obtained?

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How is the degree of polymerization of the polymer obtained?

(a) Termination/ Propagation

(b) Propagation/ Termination

(c) Propagation* Termination

(d) None of the mentioned

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Question is from Methods of Polymerization topic in section Principles of Polymer Chemistry of Unit Processes

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Correct answer is (b) Propagation/ Termination

Explanation: The degree of polymerization of the polymer is obtained from the ratio of the propagation reaction to that of termination, or the ratio of the propagation reaction to that of initiation, since in the steady state the initiation and termination rates are equal.

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