Polymers

Question 1

The low density polythene (LDP) is obtained

through the free radical addition and ____________

Answer 1

H-atom abstraction

Question 2

Teflon is manufactured by heating tetrafluoroethene with a free radical or ________ catalyst at high pressures.

Answer 2

persulphate

Question 3

Acid used for nylon 6,6?

Answer 3

Adipic acid

Question 4

Dacron is manufactured by heating a mixture of ethylene glycol and terephthalic acid at 420 to 460 K in the presence of _________________ catalyst

Answer 4

zinc acetate-antimony trioxide

Question 5

_______ polymers are the oldest synthetic polymers.

Answer 5

Phenol – formaldehyde

Question 6

Natural rubber may be considered as a linear polymer of

Answer 6

cis - 1,4 - polyisoprene

Question 7

In the manufacture of tyre rubber, ___% of sulphur is used as a crosslinking agent.

Answer 7

5

Question 8

Monomer of neoprene?

Answer 8

Chloroprene

Question 9

Arrange the following polymers in decreasing order of their intermolecular forces:
Bakelite, Polythene, Buna-S, Nylon-6,6

Answer 9

Bakelite > Nylon-6,6> Polythene > Buna-S