List of top Polymer Science and Engineering Questions on Copolymerization asked in GATE XE

In a set of copolymerization reactions, the following monomer reactivity ratios (\(r_1\) and \(r_2\)) were found for different cases: \[ \begin{array}{|c|c|c|} \hline \text{Case} & r_1 & r_2 \\ \hline I & 0.1 & 10 \\ II & 0.003 & 0.02 \\ III & 3.4 & 5.6 \\ IV & 51 & 0.01\\ \hline \end{array} \] Which option(s) correctly identify/identifies the type of copolymerization corresponding to each Case?

Polymer “Z” has a high melting point and it decomposes even before it melts. Hence, it is usually dissolved and subsequently regenerated. Rayon is one such regenerated form. Identify the polymer “Z” from the following options.

Match the Product with the most appropriate Processing Technique employed.

Among the options given, which method(s) is/are used for the synthesis of atactic polystyrene?

Polymer wetting is improved by the addition of fillers with functional groups. In a typical case-study, natural-clay was modified with hydroxyl groups and compounded with Nylon 6 along with an antioxidant. The resulting composite exhibited poor mechanical properties. Which one among the options given explains this observation?

A high molecular weight polymer passes through different zones from the hopper to the die in an extruder. Among the options given, identify the correct match between the zones and their key functions.