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Preparation of Alcohols from Carbonyl Compounds

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what is the role of tert. butyl peroxide in polymerisation of ethene?

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Solution

Tert- butyl peroxide is used as free radical generating initiator or simply as a catalyst during the polymerisation of ethene.

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Q. During addition polymerization of ethane molecules, the initiator like benzoyl peroxide, acetyl peroxide, tert-butyl peroxide, etc. are added. Their function is to:

Q. (i) What is the role of

t

-butyl peroxide in the polymerization of ethene?
(ii) Identify the monomers in the following polymer:

{[- N H - {(C H_{2})}_{6} - N H - C O - {(C H_{2})}_{4} - C O -]}_{n}

(iii) Arrange the following polymers in the increasing order of their intermolecular forces:

Polystyrene, Terylene, Buna-S

(iv) Write the mechanism of free radical polymerization of ethene.

Q. (i) What is the role of benzoyl peroxide in the polymerization of ethene?
(ii) Identify the monomers in the following polymer:

(iii) Arrange the following polymers in the increasing order of their intermolecular forces:
Nylon-6, 6, Polythene, Buna-S

Q. The Ziegler-Natta catalyst used for polymerisation of ethene and styrene is

T i C l_{4} + (C_{2} H_{5})_{3} A l

, the catalysing species (active species) involved in the polymerisation is :

Write the free radical mechanism for the polymerisation of ethene.

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