Polymer Technology

Question: In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is
[A].

terylene

[B].

polybutadiene

[C].

PVC

[D].

polypropylene

Answer: Option A

Explanation:

No answer description available for this question.

Question: Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is
[A].

nylon-66

[B].

teflon

[C].

polyester

[D].

bakelite

Answer: Option B

Explanation:

No answer description available for this question.

Question: In condensation polymerisation as compared to addition polymerisation
[A].

the monomers are unsaturated compounds.

[B].

no co-product is lost.

[C].

the monomers contain two functional groups.

[D].

generally only one monomer is involved

Answer: Option C

Explanation:

No answer description available for this question.

Question: Branched chair polymers as compared to linear polymers have
[A].

higher melting point.

[B].

higher tensile strength.

[C].

lower density.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Neoprene is rendered non-inflammable, because of
[A].

its cross-linked structure.

[B].

its linear chain structure.

[C].

the presence of chlorine atoms in its monomer.

[D].

the absence of chlorine atoms in its monomer.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Diphenylamine is added to rubber to
[A].

valcanise it.

[B].

protect it from deterioration on exposure to air.

[C].

make it non-inflammable.

[D].

make it thermosetting.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Ion exchange resins are made of
[A].

lucite

[B].

sulphonated bakelite

[C].

polystyrene

[D].

teflon

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ polymer is used for making unbreakable crockery.
[A].

Thermoplastic

[B].

Melamine

[C].

Addition

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.