Question

Polydispersity index is defined as ______ where Mw and Mn are the weight average and number average molecular masses respectively.

• A. Mw x Mn
• B. Mw/Mn
• C. Mn/Mw
• D. Mw – Mn

Answer 1

Answer:

B. Mw/Mn

Polydispersity index (PDI) is defines as the ratio of weight average molecular mass to the number average molecular mass. It gives an idea of the homogeneity of the polymer.