IGNOU MCH 21 SOLVED ASSIGNMENT

Included:

MCH 021 (January 2026 - July 2026) - ENGLISH

Tutor Marked Assignment
Chemistry of Polymers and Materials

Course Code: MCH-021
Assignment Code: MCH-021/TMA/2026
Maximum Marks: 100

Note: Attempt all the questions. The marks for each question are indicated against it.

1. (a) What are pendant groups? Give one example.

(b) Illustrate different arrangements of polymers according to their tacticity.

2. (a) Give one example each for an addition and a condensation polymer.
(b) Which type of initiators can be used to initiate anionic polymerisation? Give any two examples.

3. In the kinetics of uncatalysed step growth polymerisation, arrive at the following expression:

4. Discuss the free electron molecular orbital model of conduction in conducting polymers.

5. (a) What features are required in a conducting polymer?

(b) Name any two polycarboxylic acids which can behave as pH-responsive polymers.

6. Discuss how pH-sensitive smart polymers can be used in glucose sensors.

7. Discuss the mechanism of biological degradation of polymers by microorganisms.

8. (a) Give the products formed by aerobic and anaerobic biodegradation of biodegradable polymers.

(b) Name four types of hydrogels based on four their composition.

(c) What is artificial kidney?

9. For cross linking by free radical polymerisation in hydrogels, name any two initiators, a cross linking agent and any two monomers.

10. (a) List any four characteristics of artificial blood.
(b) What is PBT? Give its use.

11. Give the important applications of glass. What are the various oxides which plays an important role in firing of traditional ceramics?

12. Give the classification of composites. Explain any one of the physical methods of preparation of nanomaterials.

13.Explain the magnetic properties of nanomaterials.

14. Explain briefly the common methods for thin film deposition.

15. What is the difference between Langmuir-Schaefer (LS) and Langmuir-Blodgett (LB) films?

16. What are liquid crystals? Give the structural requirements of liquid crystals. 

17. (i) Draw comparative amongst of molecules in solids, liquids and liquid crystals.

(ii) What is hydrophobic lipophilic balance? Briefly explain.

18. What are main chain liquid crystal polymers? Explain with the help of suitable examples.

19. (i) Give the applications of LCPs in electronics.

(ii) What are micelles? Briefly explain using a diagram.

20. What is CMC? List the factors affecting it.

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