NATIONAL OPEN UNIVERSITY OF NIGERIA
14/16 AHMADU BELLO WAY, VICTORIA ISLAND, LAGOS
SCHOOL OF SCIENCE AND TECHNOLOGY
MARCH/APRIL 2014 EXAMINATION
COURSE CODE: CHM 408
COURSE TITLE: POLYMER CHEMISTRY
TIME ALLOWED: 2 HOURS
INSTRUCTION: Six questions to answer four (each question carriers a total 17 marks)
1 a) Explain the term polymerization (3marks)
b) Outline the distinctive features between additional and condensation polymerization
(10marks)
c) Mention the initiators for free radical, cationic and anionic polymerization process
(4 marks)
2 a) Give three examples of labile bonds in organic compounds (polymers) (4 marks)
b) List five examples of addition and condensation polymers (5marks)
c) Explain how the following affects polymer solubility:
i) polarity ii) cross linking iii) molecular weight iv) branching
(2 marks each = 8marks)
3a) Distinguish between thermoplastics and thermosetting polymers (10marks)
b) List three examples of thermosets polymers and their industrial applications. (7 marks)
4a) Enumerate five agents of degradation and likely susceptible polymers. (10marks)
b) Define polymer degradation and enumerate types of polymer degradation. (7 marks)
5a) Outline six properties of polyurethane (6 marks)
b) With equations show how polyurethane can be synthesized (7marks)
c) Explain rubber elasticity (4 marks)
6 a) Define copolymerization (3 marks)
b) State any five advantages of copolymerization (5marks)
c) Discuss in detail with structural examples type of copolymers (9marks)
You can get the exam summary answers for this course from 08039407882
Check the sample below
