Polymer Science and Engineering exam (WPE 101) from the 2024 Level-1 Term-II finals, two full papers, BUTEX affiliated colleges. Questions cover polymerization techniques, tacticity, molecular weight averages, glass transition, and the fringe micelle structure.
Q1
Level-1 Term-II, Final Exám-2024
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 repeat unit, retarder and end group.
(b) Classify polymers based on (i) geometrical structure (ii) behavior towards heat.
(c) Distinguish between oligomer and polymer.
[3+6+3=12]
2. (a) Describe connection between DP and reaction extent.
(b) State AA-BB type and A-B type of poly condensation reaction with example.
(c) What is a polydispersity index? Write a comparison of monodispersity and polydispersity.
[3+4+5=12]
3. (a) How can you purify the raw materials before polymerization?
(b) What is a Tacticity? Distinguish between emulsion and bulk polymerization techniques.
Q2
Level-1 Term-I, Final Exám-2024
Subject: Polymer Science & 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) What are meant by Oligomer, repeating unit, inhibitor and degree for polymerization?
(b) Write the values of DP and Polymeric structure of acetate, Polyester and nylon 6, 6 fibre.
(c) Narrate about thermoplastic and thermosetting polymer.
(d) Write the differences between synthetic and natural polymer.
[2+3+4+3 = 12]
2. (a) Establish the relationship between DP and extent of reaction.
(b) Describe the mechanism of cationic polymerization process with reaction.
(c) State AA-BB type and A-B type of poly condensation reaction with example.
[3+5+4 = 12]