Styrene is polymerized by free radical mechanism in solution. The initial monomer and initiator concentrations are 1 M and 0.001 M, respectively. At the polymerization temperature of 60ºC, the initiator efficiency is 0.30. The rate constants at the polymerization temperature are as follows: kd= 1.2 x 10-5 s-1 kp= 176 M-1s-1 kt= 7.2 107m-1s-1 Given this information, determine the following; a. Rate of initiation at 1 min and at 16.6 hrs b. Steady-state free radical concentration at 1 min c. Rate of polymerization at 1 min

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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Styrene is polymerized by free radical mechanism in solution. The initial monomer and initiator concentrations are 1 M and 0.001 M, respectively. At the polymerization temperature of 60ºC, the initiator efficiency is 0.30. The rate constants at the polymerization temperature are as follows:

kd= 1.2 x 10-5 s-1

kp= 176 M-1s-1

kt= 7.2 107m-1s-1

Given this information, determine the following;

a. Rate of initiation at 1 min and at 16.6 hrs

b. Steady-state free radical concentration at 1 min

c. Rate of polymerization at 1 min

 

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