Recent questions and answers in Polymer Characterization

Match the material property in Column $\text{I}$ with the measurement technique in Column $\text{II}$.${\text{Column I}}$${\text{Column II}}$$\text{P}$Electrical conducti...

For a polydisperse polymer, the viscosity-average molecular weight $\left(\bar{M}_{v}\right)$ becomes equal to the weight-average molecular weight $\left(\bar{M}_{w}\righ...

Select the correct option to match the Characterization technique with the Information that is obtained using these techniques.Characterization techniqueInformation$\text...

​​​​Which one of the following permits the direct determination of intrinsic viscosity of a polymer solution for known molecular weight of the polymer?Flory-Huggins equat...

The density of an amorphous polymer is $0.77 \mathrm{~g} \mathrm{~cm}^{-3}$ and that of its crystalline counterpart is $0.99 \mathrm{~g} \mathrm{~cm}^{-3}$. The density o...

Titration was used to determine the molar mass of two linear monodisperse polymers $\text{A}$ and $\text{B}$. Both the polymers possess the same repeat unit and contain a...

A certain polymer synthesized in the laboratory shows that all the chains have same number of repeat units $\text{(i.e., same degree of polymerization)}$. The relationshi...

If a given poly(ethylene) sample with specific volume, $v=1.042 \times 10^{-3} \mathrm{~m}^{3} \mathrm{~kg}^{-1}$ shows:specific volume of the crystalline fraction, $v_{c...

A monodisperse polymer sample of molecular weight $10,000 \mathrm{~g} \mathrm{~mol}^{-1}$ is mixed with another monodisperse sample of the same polymer of molecular weigh...

The dilute solution viscometry data for two samples of a polymer with two different molecular weights are shown in the figure, where $\eta_{s p} / c$ has been plotted aga...

Q. 127 Polyvinylidine fluoride (PVDF) was quenched from the melt in one case and in the other case, it was slowly cooled from the melt at $10^{\circ} \mathrm{C} / \mathrm...

Q. 129 A polymer weighing $0.2 \mathrm{~g}$ is dissolved in $100 \mathrm{ml}$ of benzene and has a relative viscosity of 1.5 . The polymer obeys Mark-Houwink equation wit...

Q. 131The molar mass distribution of a polymer is\begin{tabular}{|l|l|}\hline Number of molecules & Molar mass (g/mol) \\\hline 100 & 7500 \\\hline 50 & 5000 \\\hline\end...

A differential scanning calorimetry $\text{(DSC)}$ experiment tracks the heat flow into or out of a system as a function of temperature. If the experiments given in the o...