Number average molecular mass nbsp-and weight average molecular mass of synthetic polymers are related as- nbsp-

The correct option is A For synthetic polymers, PDI gt; 1 This is because man made polymers have a wide range of molecular chain lengths and weights, which ...

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Standard XII

Chemistry

Molecular Weight of Polymers

Number averag...

Question

Number average molecular mass and weight average molecular mass of synthetic polymers are related as?

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Solution

The correct option is C

For synthetic polymers, PDI > 1

This is because man-made polymers have a wide range of molecular chain lengths and weights, which increases their 'dispersity' in chain length and weight.

So, for man-made polymers, $M_{w} > M_{n}$

Proteins are usually mono-disperse, meaning that their chain lengths and molecular weights remain the same. So, PDI = 1.

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