Polymers

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

(a) Dacron is obtained by heating terephthalic acid with ethylene glycol at 425–475 K. It is a condensation polymer.

(b) Bakelite is a condensation polymer. It is obtained by treating phenol with formaldehyde in the presence of an acidic or basic catalyst.

The condensation of o-hydroxy benzyl alcohol or p–hydroxy benzyl alcohol gives a linear polymer called ‘Novolac’.

On further heating with formaldehyde ‘novolac’, undergoes cross-linking to form an infusible solid called bakelite.

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

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Nylon - 6 is a polymer of _________.

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Discuss the synthesis, properties and uses of polyesters.

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

Poly-monochlorotrifluoroethene

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

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

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

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The three natural fibres are __________ or ______and_____.

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

Natural Rubber

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