POLYMER TECHNOLOGY QUIZ

The rate controlling step in the manufacture of silicone rubber is the

None of these

Condensation of siloxane to silicone

Polymer termination step

Initial hydrolysis of silicone monomer

TRUE ANSWER : ?
YOUR ANSWER : ?

Polyesters are manufactured by the polycondensation reaction of

Carboxylic acid with ethylene

Dibasic acid with dihydric alcohol

Inorganic acid with ethylene glycol

A single monomer

TRUE ANSWER : ?
YOUR ANSWER : ?

Polyvinyl alcohol is used as a

Cation/anion exchanger

Water soluble adhesive

Non-sticky coating on frying pans

Textile fibre

TRUE ANSWER : ?
YOUR ANSWER : ?

Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is

7 kgf/cm² and 70 °C

7 kgf/cm² and 700°C

1 kgf/cm² (gage) and 70°C

1000 kgf/cm² and 100°C

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not a polyolefin?

Neoprene

Polypropylene

Polystyrene

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Thermosetting resins/polymers as compared to thermoplastic ones are

Soluble in all organic solvents

More brittle

Formed by addition polymerisation only

Easily reshaped & reused

TRUE ANSWER : ?
YOUR ANSWER : ?

Nylon 6 as compared to nylon 6, 6 has lower

Adhesion to rubber

Hardness

Abrasion resistance

Thermal stability

TRUE ANSWER : ?
YOUR ANSWER : ?

Pickout the wrong statement.

The intermoleculer forces in ther-mosplastic polymers are intermediate to that of elastomers & fibres

Polymers made of more than one monomer is called copolymer or mixed polymer

Polymers made of only one monomer is called homopolymer

Vulcanised rubber is more elastic than natural rubber

TRUE ANSWER : ?
YOUR ANSWER : ?

In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of

Polyamides

Cross linked polystyrene

Phenol formaldehyde resins

Polyesters

TRUE ANSWER : ?
YOUR ANSWER : ?

The monomer of natural rubber is

Isoprene

Both B and C

DMT

2 methyl-1-propene

TRUE ANSWER : ?
YOUR ANSWER : ?