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If overline(M)(e) is the weight average ...

If `overline(M)_(e)` is the weight average molecular weight and `overline(M)_(e)` is the number average molecular weight of a polymer, the poly dispersity index (PDI) of the polymer is given by

A

`(overline(M)_(n))/(overline(M)_(w))`

B

`(overline(M_(w)))/(overline(M_(n)))`

C

`overline(M)_(w)xxoverline(M)_(n)`

D

`(1)/(overline(M)_(w)xxoverline(M_(n)))`

Text Solution

Verified by Experts

The correct Answer is:
B
Polydispersity index is the ratio of weight average molecular to the number average molecular weight. It can be donated as,
`PDI=(overline(M)_(w))/(overline(M_(N)))=`Weight average molecular weight/number average molecular weight
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