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National Open University Exam Past Question – CHM408 JUNE/JULY EXAMINATION

NATIONAL OPEN UNIVERSITY OF NIGERIA CHM408 POLYMER CHEMISTRY

14/16 AHMADU BELLO WAY, VICTORIA ISLAND, LAGOS

SCHOOL OF SCIENCE AND TECHNOLOGY JUNE/JULY EXAMINATION

 

COURSE CODE:    CHM408

COURSE TITLE:   POLYMER CHEMISTRY TIME ALLOWED: 2 hrs

INSTRUCTION:    Answer any four questions

 

Question 1

  1. a) Write short notes on the following:
  2. i) Monomer ii) homopolymer   iii) copolymer                                             (6marks)
  3. b) State five major differences between addition polymers and condensation polymers

 1

 

(7 2

marks)

 

  1. c) What are geometric isomers? Give two exa                                              (4 marks)

 

Question 2

 1

 

  1. a) Identify the components of four condensation polymers and their uses (7 2

marks)

 

  1. b) Differentiate between tactic and atactic polymers.                                              (10 marks)

 

Question 3

  1. a) Differentiate between the types of polymer solvents.  (6marks)
  2. b) Discuss the solution process which occurs when a polymer is added to a solvent (5marks)
  3. c) Explain how the following affects polymer solubility:
2
  1. i) polarity ii) cross linking     iii) molecular weight          iv) branching                   (6 1  marks)

 

Question 4

 1

  1. a) Discuss in detail the mechanical properties of polymers                                      (8 2 marks)
  2. b) Enumerate five agents of degradation and likely susceptible polymers.                (5marks)
  3. c) Define polymer degradation and enumerate types of polymer degradation.        (4marks)

 

Question 5

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a) Give a detailed explanation of copolymerization. (4marks)
b) Mention the benefits of copolymerization (4marks)
2
  1. c) List and discuss the different types of copolymers (9 1  marks)

 

 

Question 6

  1. a) Define the term chromatography                                                                    (3marks)
 1
  1. b) Briefly write on the relevance of chromatography to the polymer industry     (4 2 marks)
  2. c) State any three physical properties of polymer that can be identified by the following techniques:  (10 marks)
  3. i) infrared/FTIR                             ii)     thermomechanical analysis
  4. ii) differential thermal analysis  iv)        X-ray

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