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What is PDI (Poly Dispersity Index ) ?...

What is PDI (Poly Dispersity Index ) ?

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The poly dispersity index (PDI) of a polymer is ( overline(M_(w)) = weight average molecular mass and overline(M_(n)) number average molecular mass)

If bar(M)_(w) is the weight -average molecular weight and bar(M)_(n) is the number -average molecular weight of polymer, the poly dispersity index (PDI) of the polymer is given by

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

The mass average molecular mass and number average molecular mass of a polymer are respectively 40,000 and 30,000. The poly dispersity index of polymer will be

The poly dispersity index of a polymer is 1.5. If its number average molecular mass is 30,000 calculate its weight average molecular mass

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