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Polymers

Long Answer Type

141.

Elaborate the structure of natural rubber.

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142. Why does styrene undergo anionic polymerization easily?

578 Views

143. Explain how does 1, 3-butadiene polymerize by different routes?

374 Views

144.
Give the monomers and uses of each of the following addition polymers:
(a) Polyethylene

(b) Polypropylene

(c) Polystyrene.

(a) Polyethylene monomer is ethylene. It is a whitish, translucent polymer of moderate strength. It is used for making containers and bottle moulds articles and as an electrical insulator.

(b) Polypropylene monomer is propylene. It is harder and stronger than polyethylene and is used as liners for bags, packing of textiles and foods.

(c) Polystyrene monomer is styrene. It is transparent polymer used for hot drink cups, toys and household articles.

164 Views

145. How does the presence of benzoquinone inhibit the free radical polymerization of a vinyl derivative?

520 Views

146.

What are linear polymer and branched chain polymers? How do these differ from own linked polymers?

890 Views

Short Answer Type

147.

Define a polymer. Write the monomer used for the preparation of dacron. Mention a use of it.

257 Views

148.

Explain with suitable examples:
(i) Natural polymers
(ii) Synthetic polymers.

128 Views

149.

Write the names and molecular structure of the monomers of the following:
(i) Natural rubber (ii) Neoprene.

137 Views

150.

Write the names and structures of the monomers of the following polymers:
(i) Polystyrene (ii) Neoprene.

828 Views