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Polydispersity Index

What is the f...

Question

What is the formula for PDI?

A

\frac{_{n}}{_{w}}

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B

\frac{_{W}}{_{n}}

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C

\frac{{_{W}}^{2}}{_{n}}

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D

\frac{_{W}}{{_{n}}^{2}}

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Solution

The correct option is C $\frac{{_{W}}^{2}}{_{n}}$
$P . D . I = \frac{_{W}}{_{n}}$

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Similar questions

Q. For natural polymers, PDI is generally ___

Q. PDI for natural polymers is generally close to:

Q. (1) : For natural polymers, PDI value is always equal to unity.

(2) : The ratio of

_{w}

_{n}

of a polymer is called PDI.

Q. The PDI (polydisersity index) is the ratio of weight to number-average molecular masses,

M ¯ w / M ¯ n

. In natural polymers, which are generally monodispersed, PDI is ............. and in synthetic polymers which are always polydispersed, PDI is ............. because

M ¯ w

is always ............. than

M ¯ n

. Fill in the blanks.

Q. The abbreviation PDI refers to__________.

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