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Molecular Weight of Polymers

The number av...

Question

The number average molecular mass and mass average molecular mass of a polymer are $30, 000$ and $40, 000$ respectively. The PDI of the polymer is

< 1

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> 1

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1

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Solution

The correct option is B $> 1$
PDI (Polydispersity Index) is the ratio of the mass average molecular mass to the number average molecular mass.

Therefore, $PDI = \frac{40000}{30000} = 1.33$ .

Thus, PDI of the polymer is $> 1$ .

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Similar questions

The mass average molecular mass & number average molecular mass of a polymer are respectively 40,000 and 30,000. The polydispersity index of polymer will be ?

Q. The number average molar mass and mass average molar mass of a polymer are respectively

30, 000

and

40, 000

. The polydispersity index (PDI) of the polymer is:

Q. The

P

(PDI) of a polymer is :

({¯ ¯¯¯¯ ¯ M}_{w} =

weight average molecular mass and

{¯ ¯¯¯¯ ¯ M}_{n} =

number average molecular mass)

Q. The

P

(poly) Dispersity Index

(P D I)

of a polymer is:

(_{w} =

weight average molecular mass and

_{n} =

number average molecular mass).

Q. A sample of polymer contains

30 %

molecules with molecular mass

20, 000

40 %

with molecular mass

30, 000

and

30 %

with molecular mass

60, 000

. What is the number average molecular mass of the polymer?

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The number average molecular mass and mass average molecular mass of a polymer are 30,000 and 40,000 respectively. The PDI of the polymer is

The correct option is B >1PDI (Polydispersity Index) is the ratio of the mass average molecular mass to the number average molecular mass.Therefore, PDI=4000030000=1.33.Thus, PDI of the polymer is >1.

The number average molecular mass and mass average molecular mass of a polymer are $30, 000$ and $40, 000$ respectively. The PDI of the polymer is

The correct option is B $> 1$
PDI (Polydispersity Index) is the ratio of the mass average molecular mass to the number average molecular mass.

Therefore, $PDI = \frac{40000}{30000} = 1.33$ .

Thus, PDI of the polymer is $> 1$ .