NATIONAL OPEN UNIVERSITY OF NIGERIA
14-16 AHMADU BELLO WAY, VICTORIA ISLAND LAGOS
SCHOOL OF SCIENCE AND TECHNOLOGY
MARCH/APRIL 2015 EXAMINATION
SCHOOL OF SCIENCE AND TECHNOLOGY
COURSE CODE: CHM 408
COURSE TITLE: POLYMER CHEMISTRY
INSTRUCTION: Answer question 1 and any other three (3) questions
Time: 2hours
Question 1
- a) Write short notes on each the followings: i) Monomer ii) homopolymer iii) copolymer (4 1/2 marks)
b) Describe five major differences between addition polymers and condensation polymers (10 marks)
c) What are geometric isomers? Give two examples to illustrate. (3 marks)
Question 2
a (i) Enumerate five agents of polymer degradation
(ii) For each agent mentioned in a (i) above, give two (2) examples of susceptible polymers. (71/2marks)
b) List and explain the four chemical structures that affect the dissolution of polymers. (10marks)
Question 3
a) Analyze critically the types of polymer solvents (7 marks)
b) Describe the solution process which occurs when a polymer is added to a solvent. (6 marks)
c) Distinguish between tactic and atactic polymers (4 marks)
Question 4
a) Discuss any six properties of thermoplastics which distinguish them from thermosetting polymers (71/2marks)
b) With the aid of example (and equations) describe the mechanism of condensation polymerization.(10 marks)
Question 5
5a) What do you understand by the term “copolymerization.”?(3 marks)
5b) Mention the benefits of copolymerization with at least two examples of copolymers and the extent of improvement achieved (81/2 marks)
5c) Describe briefly the different types of copolymers (6 marks)
Question 6
a) Explain briefly the term “chromatography “ (3 marks)
b) Outline 6 importance of chromatography to the polymer industry (6 marks)
c) State any three physical properties of polymer that can be identified by the following techniques:
i) infrared/FTIR
ii) thermomechanical analysis
iii) differential thermal analysis
iv) X-ray (8 marks)
You can get the exam summary answers for this course from 08039407882
Check the sample below
