(i) Calculate the stoichiometric imbalance factor in a polymerization reaction between adipic acid and hexamethylene diamine at the percent conversion of 0.994 to obtain poly(hexamethylene adipate) with number average molecular weigth of 19,000 g/mol. Given that the molecular weight of the repeat unit of poly(hexamethylene adipate) is 113 g/mol. (ii) If in the above polymerization, 10 mol % of excess diamine were to be used in the polymerization reaction, what number average molecular weight would be obtained if the reaction were carried to 93 % conversion of monomer? (iii) Explain how the increase in molecular weight of polymer affect the rate of chemical reaction in the step-growth polymerization.

(i) Calculate the stoichiometric imbalance factor in a polymerization reaction between adipic acid and hexamethylene diamine at the percent conversion of 0.994 to obtain poly(hexamethylene adipate) with number average molecular weigth of 19,000 g/mol. Given that the molecular weight of the repeat unit of poly(hexamethylene adipate) is 113 g/mol. (ii) If in the above polymerization, 10 mol % of excess diamine were to be used in the polymerization reaction, what number average molecular weight would be obtained if the reaction were carried to 93 % conversion of monomer? (iii) Explain how the increase in molecular weight of polymer affect the rate of chemical reaction in the step-growth polymerization.

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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