3. The thermal polymerization of B-carboxymethyl caprolactam proceeds by an initialisomerization via a second-order kinetic process followed by condensation of the isomerto the polymer:-NH-NH2IsomerizationPolymerizationHOThe data below were obtained at 270 °C for the polymerization of B-carboxymethylcaprolactam.t (min)c (mol fraction)200.042300.039400.028500.024600.021800.018900.0151100.0131200.012Given that the rates of polymerization are first order in vNH, and v(cO),0 and vNH, =V(CO),0 -(1) Using a graphical method, determine whether these data indicate catalyzed oruncatalyzed conditions, and evaluate the rate constant for the polymerization.(ii) Describe a method by which the values of c (mol fraction) might be determined.(Where vNH, and v(co),0 are the number of NH2 and (CO),0 functional groups.)

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3. The thermal polymerization of B-carboxymethyl caprolactam proceeds by an initial isomerization via a second-order kinetic process followed by condensation of the isomer to the polymer: NH -NH2 Isomerization Polymerization но The data below were obtained at 270 °C for the polymerization of B-carboxymethyl caprolactam. t (min) c (mol fraction) 20 0.042

3. The thermal polymerization of B-carboxymethyl caprolactam proceeds by an initial isomerization via a second-order kinetic process followed by condensation of the isomer to the polymer: NH -NH2 Isomerization Polymerization но The data below were obtained at 270 °C for the polymerization of B-carboxymethyl caprolactam. t (min) c (mol fraction) 20 0.042

Chemistry

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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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Concept explainers

Polymerization Kinetics

Polymerization is a chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that diverge in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes. Polymerization is generally classified into step-growth and chain polymerization. Polymers are categorized into linear polymer and cross-linked polymers that are produced either by condensation or additional polymerization.

Question

3. The thermal polymerization of B-carboxymethyl caprolactam proceeds by an initial
isomerization via a second-order kinetic process followed by condensation of the isomer
to the polymer:
-NH
-NH2
Isomerization
Polymerization
HO
The data below were obtained at 270 °C for the polymerization of B-carboxymethyl
caprolactam.
t (min)
c (mol fraction)
20
0.042
30
0.039
40
0.028
50
0.024
60
0.021
80
0.018
90
0.015
110
0.013
120
0.012
Given that the rates of polymerization are first order in vNH, and v(cO),0 and vNH, =
V(CO),0 -
(1) Using a graphical method, determine whether these data indicate catalyzed or
uncatalyzed conditions, and evaluate the rate constant for the polymerization.
(ii) Describe a method by which the values of c (mol fraction) might be determined.
(Where vNH, and v(co),0 are the number of NH2 and (CO),0 functional groups.)

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