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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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What are the objectives of heat treatment of metals? Objectives of heat treatment- Cause relief of internal stresses developed while cold working, welding, casting, forgi
A company is using a piece of equipment which originally cost $30,000. The equipment has been in use for 5 years, and now has a net realizable value of $6000. At the time of instal
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Hard-Baking Hard-baking is the final step in the photolithographic process. This step is essential in order to harden the photoresist and better adhesion of the photoresist to
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how to perform a leak test with nitrogen in a hydrocracking plant in Russia
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