6.13 Using carbon-14 labeled AIBN as an initiator, a sample of styrene is polymerized to an average degree of polymerization of 1.28x104. The AIBN has an activity of 8.97x10' counts per minute per mol in a scintillation counter. If 5.0 grams of the polystyrene show an activity of 315 counts per minute, determine the mode of termi- nation of polystyryl radicals.

6.13 Using carbon-14 labeled AIBN as an initiator, a sample of styrene is polymerized to an average degree of polymerization of 1.28x104. The AIBN has an activity of 8.97x10' counts per minute per mol in a scintillation counter. If 5.0 grams of the polystyrene show an activity of 315 counts per minute, determine the mode of termi- nation of polystyryl radicals.

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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Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.

Question

6.13 Using carbon-14 labeled AIBN as an initiator, a sample of styrene is polymerized
to an average degree of polymerization of 1.28x104. The AIBN has an activity of
8.97x10' counts per minute per mol in a scintillation counter. If 5.0 grams of the
polystyrene show an activity of 315 counts per minute, determine the mode of termi-
nation of polystyryl radicals.
[Ans. Coupling 93%, disproportionation 7%]

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