Question

Rate constants for termination kt may be of the order of 1x10^8 L/mol s in free radical polymerizations. Consider the polymerization of styrene initiated by ditert-butyl peroxide at 60 °C. For a solution of 0.01 M peroxide and 1.0 M styrene in benzene, the initial rate of polymerization is 1.5x10^-7 mol/L s and <Mn> of the polymer produced is 138,000. (a) From the above information, estimate kp for styrene at 60 °C. (b) What is the average lifetime of a macroradical during the initial stages of polymerization in this system?

Name: rate constants for termination kt may be of the order of 1x108 lmol s in free radical polymerizations consider the polymerization of styrene initiated by ditert butyl peroxide at 60 c for a 98433
Uploaded: 2023-03-07T05:37:15-08:00
Duration: 2 min 20 s
Channel: Sri K
Description: rate constants for termination kt may be of the order of 1x108 lmol s in free radical polymerizations consider the polymerization of styrene initiated by ditert butyl peroxide at 60 c for a 98433

          Rate constants for termination kt may be of the order of 1x10^8 L/mol s in free radical polymerizations. Consider the polymerization of styrene initiated by ditert-butyl peroxide at 60 °C. For a solution of 0.01 M peroxide and 1.0 M styrene in benzene, the initial rate of polymerization is 1.5x10^-7 mol/L s and <Mn> of the polymer produced is 138,000. (a) From the above information, estimate kp for styrene at 60 °C. (b) What is the average lifetime of a macroradical during the initial stages of polymerization in this system?

Added by Stephanie C.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Sri K

03/07/2023

Step 1

We know that the initial rate of polymerization (Rp) is given by the equation: Rp = kp * [M] * [R] where kp is the rate constant for propagation, [M] is the concentration of monomer, and [R] is the concentration of radicals. Show more…

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Rate constants for termination kt may be of the order of 1x10^8 L/mol s in free radical polymerizations. Consider the polymerization of styrene initiated by ditert-butyl peroxide at 60 °C. For a solution of 0.01 M peroxide and 1.0 M styrene in benzene, the initial rate of polymerization is 1.5x10^-7 mol/L s and <Mn> of the polymer produced is 138,000. (a) From the above information, estimate kp for styrene at 60 °C. (b) What is the average lifetime of a macroradical during the initial stages of polymerization in this system?