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171. How are the following prepared?
(a) Dacron (b) Bakelite.

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172.

Discuss the synthesis, properties and uses of polyesters.

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173.

Write the name and structure of the monomer of the following polymer:

Natural Rubber

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174.

Write the name and structure of the monomer of the following polymer:
Nylon–6,6

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Monomers of terylene are Terephthalic acid (1,4 benzene dicarboxylic acid) and ethylene glycol (1,2 ethanediol).

(a)

(b)

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176.

Write the name and structure of the monomer of the following polymer ?

Poly-monochlorotrifluoroethene

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177.

Write the name and structure of the monomer of the following polymer:
Neoprene.

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178.

What do you mean by bio-degradable polymers? Give some examples.

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179. The three natural fibres are __________ or ______and_____.

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180.

Nylon - 6 is a polymer of _________.

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