Polymer Science & Engineering paper (WPE 101) from BUTEX affiliated colleges' 2017 Level-1 Term-I finals. Covers polymer classification by monomer, living and dead polymers, average molecular weight equations, coordination polymerization, photodegradation, and Tg-Tm graphical relations.
Level-1 Term-I, Final Exám-2017
Subject: Polymer Science & Engineering, Subject 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: Polymer, Monomer, Oligomer and Degree of polymerization.
(b) Classify the polymer on the basis of monomer present with examples.
(c) Differentiate between step polymerization and chain polymerization.
[4+4+4=12]
2. (a) Define: Retarder, Inhibitor and Polypropylene.
(b) What is living polymer and dead polymer?
(c) Explain the mechanism of free radical polymerization.
[4+4+4=12]
3. (a) Mention the types of average molecular weight with equations.
(b) Prove that , where is the molecular weight of each molecule and is the number of each molecular present in the polymer.