Question

The number average molar mass and the mass average molar mass of a polymer is 30000 and 40000, respectively. The polydispersity index (pdi) of the polymer is

Answer 1

A)

Given :

Mw¯ of the polymer =40,000

MN¯ of the polymer =30,000

Poly dispersity index (PDI) of a polymer is

PDI=Mw¯MN¯

⇒4000030000

⇒1.33>1

Hence (b) is the correct answer.