Recent questions tagged polymer-processing

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

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...

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{...

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...

A single-screw extruder is operated at $12$ $\mathrm{rpm}$ under open discharge condition (i.e., without a die).The screw has a diameter of $10$ $\mathrm{cm}$, a distance...

​​Match the Product with the most appropriate Processing Technique employed.$$\begin{array}{|l|l|l|l|} \hline & \textbf{Product} & & \textbf{Processing Technique} \\ \hli...

Match the $\textbf{Polymer}$ with the most suitable $\textbf{Monomer combinations}$ from which it is synthesized.$\begin{array}{|l|l|l|l|} \hline& \textbf{Polymer} && \te...

​​​​Injection molding is typically used to make plastic parts. If the pressure at the gate is monitored as a function of time during the injection of a thermoplastic poly...

​​​Choose the option(s) that correctly match(es) the $\textbf{Zones}$ with their typical $\textbf{Functions}$ in an industrial extruder$$\begin{array}{|l|l|l|l|} \hline &...

​​​​​Which option(s) correctly match(es) the $\textbf{Class of additives}$ used during polymer compounding with the corresponding $\textbf{Chemicals}$?$$\begin{array}{|l|...

A rubber contains $70 \mathrm{wt} \%$ butadiene (molar mass $=54 \mathrm{~g} / \mathrm{mol})$, $20 \: \mathrm{wt} \%$ isoprene (molar mass $=68 \mathrm{~g} / \mathrm{mol}...

The 'die swell' phenomenon exhibited by a polymer melt is due toviscous deformationplastic deformationviscous and elastic deformationelastic recovery

Thermoforming operation of semi-crystalline polymers with glass transition temperature, $T_{g}$, and melting temperature, $T_{m}$, is carried out at a temperature $T$, in...

Which of the following polymers is/are synthesized by ring opening polymerization?Poly$\text{(lactic acid)}$Poly$\text{( $\varepsilon$-caprolactone)}$Poly$\text{(styrene)...

Match the following additives to their respective functions for poly$\text{(vinyl chloride)}$ compounding.AdditiveFunctionP. Dibutyltin maleate1. LubricantQ. Epoxydized s...

Biaxially oriented poly$\text{(propylene)}$ exhibits high clarity because layering of the crystalline structuresdecreases the variation in refractive index across the fil...

\begin{tabular}{|c|c|c|c|c|}\hline \multirow[t]{3}{*}{ Q. 114} & \multicolumn{4}{|c|}{\begin{tabular}{l}A high molecular weight polymer passes through different zones fro...

\begin{tabular}{l|l|}Q. 118 & Choose the correct option that best correlates the graphs with the polymerization \\methods. \\\hline& $\mathrm{P}$ - living polymerization;...

\begin{tabular}{|c|c|c|c|c|}\hline \multirow[t]{6}{*}{ Q. 119} & \multicolumn{4}{|c|}{\begin{tabular}{l}From the options given, identify the correct match(es) between the...