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

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= 1

answer is A.

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Detailed Solution

$PDI = \frac{M_{w}}{M_{n}} = \frac{40000}{30000} = 1.33 (> 1)$

M_w is the mass average molecular mass of a polymer and M_n is the number average molecular mass.

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