Molecular Masses of Polymers

The number average molecular mass and weight average molecular mass of a polymer are $30,000$ and $40,000$ respectively. The PDI of the polymer is

Why do we consider the weight average molecular mass of polymers?

The most suitable method for determination of the molecular mass of polymer is?

In a polymer sample $35\%$ of molecules have a molecular mass $24,000$, $40\%$ have $30,000$ and the rest molecules have a molecular mass of $50,000$. What is the number average molecular mass of the polymer?

In a polymer sample, the molecular weight of $30$ molecules is $25,000$, molecular weight of $25$ molecules is $30,000$ and molecular weight of another $40$ molecules is $43,000$ then calculate the weight average molecular weight (${\stackrel{-}{\mathrm{M}}}_{\mathrm{w}}$) of the polymer.

In a polymer sample, the molecular weight of $10$ molecules is $20,000$, molecular weight of $30$ molecules is $35,000$ and molecular weight of another $20$ molecules is $40,000$ then calculate the number average molecular weight (${\stackrel{-}{\mathrm{M}}}_{\mathrm{n}}$) of the polymer.

Explain the determination of molecular mass of polymers by number average molecular weight method.

Polymer properties are closely related to their molecular mass, size and _____ .

Define molecular mass of a polymer.

Explain the method of determining the molar mass of the polymer.

In a polymer sample, the molecular weight of $20$ molecules is $20,000$, molecular weight of $40$ molecules is $30,000$ and molecular weight of another $20$ molecules is $40,000$ then calculate the number average molecular weight (${\stackrel{-}{\mathrm{M}}}_{\mathrm{n}}$) of the polymer.

Explain the determination of molecular mass of polymers by weight average molecular weight method.

Write a short note on molecular mass of polymers.

The polydispersity index of the polymer is always:

In a polymer, there are $300$ molecules with a molecular weight of $100, 200$ molecules with a molecular weight of $1000$ and $100$ molecules with a molecular weight of $10000.$ The number average molecular weight of polymer is

Why molecular weight of polymers is taken as average molecular weight. How many types average molecular weight can be represented? Explain each type.

Why PDI of proteins is one?

What is polydispersity index? Explain.

Write formula for number average molecular weight (${\stackrel{-}{\text{M}}}_{\text{n}}$).

The P Dispersity Index (PDI) of a polymer is ( ${\stackrel{-}{\mathrm{M}}}_{\mathrm{w}}=$ weight average molecular mass and ${\stackrel{-}{\mathrm{M}}}_{\mathrm{n}}=$ number average molecular mass)