MCQ
The abbreviation $\text{PDI}$ refers to $.........$
- AName of the polymer
- ✓Polydispersity index of the polymer
- CApplication of the polymer
- DPolydiagonal index
✓
Answer
Correct option: B.
Polydispersity index of the polymer
The polydispersity index $\text{(PDI)}$ is a measure of the distribution of molecular mass in a given polymer sample.
The $\text{PDI}$ calculated is the weight average molecular weight divided by the number average molecular weight.
It indicates the distribution of individual molecular masses in a batch of polymers.
The $\text{PDI}$ has a value equal to or greater than $1,$ but as the polymer chains approach uniform chain length, the $\text{PDI}$ approaches unity.
The $\text{PDI}$ calculated is the weight average molecular weight divided by the number average molecular weight.
It indicates the distribution of individual molecular masses in a batch of polymers.
The $\text{PDI}$ has a value equal to or greater than $1,$ but as the polymer chains approach uniform chain length, the $\text{PDI}$ approaches unity.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Formalin is an aqueous solution of
In the reaction of formation of sulphur trioxide by contact process $2S{O_2} + {O_2} \rightleftharpoons 2S{O_3}$ the rate of reaction was measured as $\frac{{d\left[ {{O_2}} \right]}}{{dt}} = - 2.5 \times {10^{ - 4}}\,mol\,{L^{ - 1}}\,{s^{ - 1}}$ . The rate of reaction is terms of $[SO_2]$ in $mol\,L^{- 1}\, s^{-1}$ will be:
→Which of the following is used in paint removing?
The formation of gas at the surface of tungsten due to adsorption is the reaction of order
Benzoic acid and salicylic acid can be distinguished by
Reaction rate between two substance $A$ and $B$ is expressed as following $:$ rate $= k[A ]^n[B]^m$ If the concentration of $A$ is doubled and concentration of $B$ is made half of initial concentration, the ratio of the new rate to the earlier rate will be
→Method by which aniline cannot be prepared is
Reactant $(A)$ in this reaction is
→The Gibb's energy for the decomposition of $Al_2O_3$ at $500^oC$ is as follows
→$\frac{2}{3} Al_2 O_3 \rightarrow \frac{4}{3} Al + O_2$
$\Delta _rG = + 960\, kJ\, mol^{-1}$
The potential difference needed for the electrolytic reduction of aluminium oxide $(Al_2O_3)$ at $500^oC$ is at least ........ $V$.
Which can show aldol condensation reaction