Question:
Poly dispersity index of a polymer is 1.25. If \( \overline{M_n} = 800 \), what is its \( \overline{M_w} \)?
Poly dispersity index of a polymer is 1.25. If \( \overline{M_n} = 800 \), what is its \( \overline{M_w} \)?
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Poly dispersity index helps relate number average and weight average molecular masses in polymers.
Updated On: May 15, 2025
- 850
- 900
- 950
- 1000
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The Correct Option is D
Solution and Explanation
We use the relation:
\[
\text{Poly Dispersity Index (PDI)} = \frac{\overline{M_w}}{\overline{M_n}}
\]
Given: \( \text{PDI} = 1.25,\ \overline{M_n} = 800 \)
\[
\overline{M_w} = 1.25 \times 800 = 1000
\]
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