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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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Dacron is prepared by the condensation of terephthalic acid ethylene glycol in the presence of catalyst zinc acetate and antimony trioxide.

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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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130.

What is the difference between polyacrylates and polyesters?

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