Polymer Science and Engineering paper (WPE 101) from BUTEX affiliated colleges' 2021 Level-1 Term-I finals. Questions address natural versus synthetic polymer structures, Ziegler-Natta catalysis, copolymer classification, number average molecular weight derivations, and polymerization techniques.
Level-1 Term-I, Final Exám-2021
Subject: Polymer Science and Engineering (Code: WPE 101)
Time: 3.0 Hrs. Full Marks: 72
(Use separate answer script for Part: A and Part: B)
(All parts of a question must be answered consecutively)
Part: A
(Answer any three questions)
1. (a) Define monomer and oligomer.
(b) State the name of two natural and two synthetic polymer with their chemical structure, monomer and repeat units.
(c) Classify polymer on the basis of (i) Origin and (ii) Chemical nature.
(d) Establish the relation between degree of polymerization and extent of reaction (P).
[2+4+3+3=12]
2. (a) What is Ziegler-Natta catalyst? How does it work? State with mechanism.
(b) Briefly discuss the cationic polymerization process with example.
(c) Mention the salient features of step-growth polymerization.
[4+5+3=12]