M.Sc. DEGREE EXAMINATION, NOVEMBER 2017
Second Semester
Chemistry
Elective — POLYMER CHEMISTRY
(CBCS 2014 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all the questions.
1. What are polymers? How are they classified?
2. What are the two general types of polymerization?
3. How is Bakelite prepared?
4. What is meant by monomer and polymer?
5. Mention the relationship between glass transition
temperature and plasticizer.
6. Draw the planar zig-zag structure of polyethylene
molecule.
7. What is the role of Photostabilizer?
8. Mention any two important uses of polymer in
Electronics.
9. Define the term Compounding of a polymer.
10. Is Poly (styrene) a Thermosetting Polymer? Explain.
Sub. Code
4MCH2E1
AFF-4884
2
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Part B x 5 25)
Answer all questions, choosing either or
11. What are features an addition polymerization?
Or
Discuss the mechanism of chain polymerization.
12. Write the structure of monomer acrylonitrile and
preparation of polyacrylonitrile.
Or
How is polybutadiene prepared? Mention its uses.
13. Equal number of molecules with M1 15,000 and
M2 1,20,000 are mixed. Calculate Number —
average molar mass and Mass-average molar mass.
Or
Discuss the various geometrical structures of
polymer molecules.
14. Explain Bulk polymerization technique.
Or
What is meant by Polymer degradation? How are
they classified?
15. Mention the types of Plastics. How are they
distinguished?
Or
Write a note on Compounding in Plastic processing.
AFF-4884
3
Ws8
Part C x 10 30)
Answer any three questions.
16. Explain Co-Polymer and Block polymer with
suitable examples.
Discuss the mechanism of Polyaddition
polymerization.
17. Give the preparation and uses of the following
epoxy resin
polyamide
phenol formaldehyde. 3
18. What is meant by glass transition temperature? Discuss
the various affecting glass transition temperature.
19. Write a note on oxidative degradation of polymer.
Discuss the technique of suspension polymerization.

20. Explain the techniques of
Injection moulding and
Film casting.