1. Given the probability of chain propagation, B, is 25% for the polymerization of styrene,

determine the number averaged molecular weight, weight averaged molecular weight,

extent of reaction and polydispersity if the reaction is terminated by: (15 marks)

Hint: M₁ = the molecular weight of the monomer (styrene)

a. Disproportionation

b. Combination

c. Clearly explain the difference in the results.