If the number average molecular weight and weight average molecular weight of a polymer are 40000 and 60000…
If the number average molecular weight and weight average molecular weight of a polymer are 40000 and 60000 respectively, the polydispersity index of the polymer will be
$>1$
$ < 1$
1
zero
Solution
Polydispersity index,
$\mathrm{PDI}=\frac{\bar{M}_w}{\bar{M}_n}$
where, $\bar{M}_w=$ weight average molecular weight
$\bar{M}_n=$ number average molecular weight
$\mathrm{PDI}=\frac{60000}{40000}=1.5$
ie, $\quad>1$