Show by means of chemical equations the initiation, propagation, transfer and termination steps (if any) in the linear chain polymerizations a) - d) below. For each reaction, clearly show the initiating species, active center, repeating unit and end- groups of the polymer chains that are formed and comment on the mechanism involved: a) Styrene initiated with potassium amide in liquid ammonia as solvent. b) Isobutylene (2-methylpropene) initiated with boron trichloride/tert-butyl chloride as catalyst in methyl chloride as solvent. c) 1,3-Butadiene initiated with n-buytylithium (CaHgLi) in tetrahydrofuran (THF) at 30°C and quenched with ethylene oxide followed by acidification.

Show by means of chemical equations the initiation, propagation, transfer and termination steps (if any) in the linear chain polymerizations a) - d) below. For each reaction, clearly show the initiating species, active center, repeating unit and end- groups of the polymer chains that are formed and comment on the mechanism involved: a) Styrene initiated with potassium amide in liquid ammonia as solvent. b) Isobutylene (2-methylpropene) initiated with boron trichloride/tert-butyl chloride as catalyst in methyl chloride as solvent. c) 1,3-Butadiene initiated with n-buytylithium (CaHgLi) in tetrahydrofuran (THF) at 30°C and quenched with ethylene oxide followed by acidification.

Chemistry

10th Edition

ISBN:9781305957404

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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Question

Show by means of chemical equations the initiation, propagation, transfer and
termination steps (if any) in the linear chain polymerizations a) – d) below. For each
reaction, clearly show the initiating species, active center, repeating unit and end-
groups of the polymer chains that are formed and comment on the mechanism
involved:
a) Styrene initiated with potassium amide in liquid ammonia as solvent.
b) Isobutylene (2-methylpropene) initiated with boron trichloride/tert-butyl
chloride as catalyst in methyl chloride as solvent.
c) 1,3-Butadiene initiated with n-buytylithium (CAH9LI) in tetrahydrofuran (THF) at
30°C and quenched with ethylene oxide followed by acidification.
d) Propylene oxide initiated with potassium methoxide in methanol as solvent.

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