Subject: Physical Chemistry · Chapter: Polymer Chemistry · Topic: Polymerisation Kinetics · Exam: NET DEC 2011 · Marks: 2 · Difficulty: Medium
The addition polymerization of M (monomer) involves the following stages: ( $\mathrm{I}=$ initiator, $\mathrm{R}=$ free radical) The rate constant for free radical formation is $2 \times 10^{-1} \mathrm{s}^{-1}$. The initial concentration of initiator is $10^{-3} \mathrm{mol} \mathrm{dm}^{-3}$. The overall rate of the reaction is $4 \times 10^{-1} \mathrm{mol} \mathrm{dm}^{-1} \mathrm{s}^{-1}$. Assuming steady state approximation for free radical, the kinetic chain length is