Question

Which of the following polymers do not involve cross linkages?
(a) Melmac
(b) Bakelite
(c) Polythene
(d) Vulcanised rubber

Answer 1

Polythene. ..............

Answer 2

Polythene is the polymer which do not involve cross linkages.

Explanation:

• Polythene is defined as a polymer of ethylene. There are "n" number of ethylene molecules present in a polythene polymer. Chemical formula of polythene is $(CH_{2}CH_{2})_{n}$.

• In polythene, molecules of ethylene are linearly bonded together. So, there is no cross-linkage in a polythene polymer. But when monomer units are connected together through cross-linkage then this type of bonding leads to the formation of cross-linked polymer.

• For example, melmac, bakelite and vulcanised rubber are all cross-linked polymers.

Learn more about cross linked polymers:

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Learn more about linear polymer:

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