Questions without answers in Polymer Science and Engineering

Which one of the following polymer processing techniques involves shaping a heated sheet?ThermoformingInjection moldingBlow moldingExtrusion

Which of these methods is/are used for the synthesis of ceramic powders?Sol-gelHydromechanicalThermomechanicalHydrothermal

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...

Which one of the following polymerization methods is used for the synthesis of butyl rubber?Ring opening polymerizationCondensation polymerizationCationic polymerizationA...

The stress-strain profiles in the figure were obtained following longitudinal tensile loading for a brittle polymer, glass fibre, and a composite lamina consisting of uni...

Norrish-Smith effect or Trommsdorff effect during free radical bulk polymerization at high conversion is characterized by $\_\_\_\_$.increase in rate of polymerization wi...

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...

Which one of the following is NOT a rotational rheometer?Cone and plate rheometerParallel plate rheometerCapillary rheometerCylindrical Couette rheometer

Select the correct option to match the Product with the most appropriate Processing technique from the table given below:ProductProcessing technique$\text{P}$Fibre-reinfo...

Which of the following is/are the most appropriate compatibilizer(s) for the ploypropylene/Nylon $66$ blend?Maleic anhydride grafted polystyreneMaleic anhydride grafted p...

An insulating polymer is used as a dielectric medium between two capacitor plates. The dielectric constant of the polymer is $5.0$ and the permittivity of vacuum is $8.85...

Select the correct option to match the Polymer to its Major polymeric constituent from the table given below:PolymerMajor polymeric constituent$\text{P}$Natural rubber$\t...

Resol is produced by reaction of $\_\_\_\_\_\_$.phenol with an excess of formaldehyde in presence of a base catalystformaldehyde with an excess of phenol in presence of a...

Select the correct option to match the Polymer to its most suitable Monomer(s) from the table given below:PolymerMonomer(s)$\text{P}$Poly($p$-phenylene sulfide)$\text{I}$...

Select the correct option to match the Compound/Additive to its most suitable Function from the table given below:Compound/AdditiveFunction$\text{P}$Azocarbonamide$\text{...

The variation of steady shear viscosity $(\eta)$ of a polymer melt with shear rate $(\dot{\gamma})$ is shown in the figure, where $\dot{\gamma}_{s}$ is the upper limit of...

Select the correct option to match the Initiator(s) with the Method of polymerization from the table given below:Initiator(s)Method of polymerization$\text{P}$$\mathrm{BF...

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

Which of the following options is/are used to plasticize poly(vinyl chloride) (PVC)?Addition of vinyl acetate comonomer during the synthesis of PVCChlorination of PVCAddi...

A certain amount of plasticizer with a glass transition temperature $\left(T_{g}\right)$ of $-50^{\circ} \mathrm{C}$ was added to a polymer to reduce its $T_{g}$ from $70...