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1. a) How are Polymers classified?
b) Define polymerization. Differentiate addition and condensation polymerization.
2. a) Explain the free radical mechanism of addition polymerization taking ethylene as a monomer.
b) Give the synthesis and applications of Teflon.
3. a)Differentiate between thermoplastics and thermosetting plastics.
b)What is glass transition temperature?Discuss the following factors affecting GTT
i) Flexibility ii) Intermolecular forces.
4. a) Explain the manufacture and applications of the following high polymers:
i)Polymethylmethacrylates (plexi glass) ii) polyurethanes.
b) What are elastomers? Mention the advantages of synthetic rubber over natural rubber.
5. a) What are the deficiencies of natural rubber? What is vulcanization of rubber.
b) Explain the manufacture of Silicone rubber. Mention their applications.
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merits and demerits of free radical polymerisation
A contact sulphuric acid plant burns pure sulphur with air. The products of combustion pass to a converter where some of the SO 2 is converted to SO 3 at a fast rate owing to the
Why some overhanging beams have point of contra flexure?
Explain Loss Angle Loss Angle can be described as the arc-tangent of the electrical dissipation factor.
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