Polymers Question 71
Question: The mass average molecular mass & number average molecular mass of a polymer are 40,000 and 30,000 respectively. The polydispersity index of polymer will be
Options:
A) <1
B) >1
C) 1
D) 0
Show Answer
Answer:
Correct Answer: B
Solution:
[b] Average number molecular weight $ {{\overline{M}} _{n}}=30,000 $ Average mass molecular weight $ {{\overline{M}} _{w}}=40,000 $ Polydispersity index $ (PDI)\frac{{{\overline{M}} _{n}}}{{{\overline{M}} _{w}}}=\frac{40,000}{30,000}=1.33 $
BETA
