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121.

Write the monomers used for getting the following polymers.
(i) Polyvinyl chloride (ii) Teflon (iii) Bakelite.

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122.

How does the presence of double bonds in rubber molecules influence their structure and reactivity?

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123.

Write the names and structures of the monomers of the following polymers:
(1) Buna-S (2) Buna-N (3) Dacron (4)Neoprene.

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124.

Identify the monomer in the following polymer structures:

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125.

Identify the monomer in the following polymer structures:

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126.

How Dacron is obtained from ethylene glycol and tetrephthalic acid?

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127.

What is biodegradable polymer and give an example of a biodegradable aliphatic polyester?

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128. What do you mean by PDI? What does it tell us about a polymer?

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129.

Give two differences between an addition polymer and a condensation polymer.

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Polyacrylates	Polyesters
1.These are addition polymers.	1.These are condensation polymers having an ester linkage.
2.These are synthesised from various types of acrylic monomers.	Terylene is synthesised by the condensation of ethylene glycol and terephthalic acid.