Question

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a.What is the average molar mass, Mn, of a sample of polyethylene, -(-CH2CH2-)-, which has a degree of polymerization, Pn, of 100?

b. What is Pn of a polyethylene sample that has Mn = 56,000 g/mol?

5. Calculate Mn, Mw and the PDI of a polymer sample that contains equimolar amounts of chains with the following molar masses: 10 kg/mol, 20 kg/mol, 30 kg/mol, 50 kg/mol and 100 kg/mol.

6. During an end group titration of a carboxyl terminated polybutadiene, it was found that 5.2 mL of a 0.124 M potassium hydroxide solution was required to fully react with the end groups. Calculate the molar mass of the polymer. (Assume there are two end groups per chain.)

Answer 1