Question

In another series of experiments similar to those in the last problem, the low-molecular weight polyester corresponding to 82% conversion of the original COOH groups were further polymerized at 161°C in the presence of p-toluene sulfonic acid (0.004 mol per mol of polymer) yielding the conversion data (Hamann, et al., 1968) of the end hydroxyl and carboxyl acid groups showed in the table below. Determine the rate constant for the catalyzed polyesterification. Time (min) % Reaction Time (min) % Reaction 0 0 40 82.9 5 34.6 50 85.7 10 54.7 60 87.9 15 65.5 75 90.1 20 70.8 90 91.5 30 77.9 105 92.6

          In another series of experiments similar to those in the last problem, the low-molecular weight polyester corresponding to 82% conversion of the original COOH groups were further polymerized at 161°C in the presence of p-toluene sulfonic acid (0.004 mol per mol of polymer) yielding the conversion data (Hamann, et al., 1968) of the end hydroxyl and carboxyl acid groups showed in the table below.

Determine the rate constant for the catalyzed polyesterification.

Time (min) % Reaction Time (min) % Reaction
0 0 40 82.9
5 34.6 50 85.7
10 54.7 60 87.9
15 65.5 75 90.1
20 70.8 90 91.5
30 77.9 105 92.6

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In another series of experiments similar to those in the last problem, the low-molecular weight polyester corresponding to 82% conversion of the original COOH groups were further polymerized at 161°C in the presence of p-toluene sulfonic acid (0.004 mol per mol of polymer) yielding the conversion data (Hamann, et al., 1968) of the end hydroxyl and carboxyl acid groups showed in the table below.

Determine the rate constant for the catalyzed polyesterification.

Time (min) % Reaction Time (min) % Reaction
0 0 40 82.9
5 34.6 50 85.7
10 54.7 60 87.9
15 65.5 75 90.1
20 70.8 90 91.5
30 77.9 105 92.6

Added by Gregory A.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

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Solved by Expert Adi S

06/22/2023

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In another series of experiments similar to those in the last problem, the low-molecular weight polyester corresponding to 82% conversion of the original COOH groups were further polymerized at 161°C in the presence of p-toluene sulfonic acid (0.004 mol per mol of polymer) yielding the conversion data (Hamann, et al., 1968) of the end hydroxyl and carboxyl acid groups showed in the table below. Determine the rate constant for the catalyzed polyesterification. Time (min) % Reaction Time (min) % Reaction 0 0 40 82.9 5 34.6 50 85.7 10 54.7 60 87.9 15 65.5 75 90.1 20 70.8 90 91.5 30 77.9 105 92.6

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