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Polymer Technology
Comments
Question
Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature.
Options
A. nylon
B. polyacrylonitrile
C. polypropylene
D. polyester
Correct Answer
polyacrylonitrile
Polymer Technology problems
Search Results
1. Phenol formaldehyde
Options
A. employs addition polymerisation.
B. employs condensation polymerisation.
C. is a monomer.
D. is an abrasive material.
Show Answer
Scratch Pad
Discuss
Correct Answer: employs condensation polymerisation.
2. Thermosetting materials
Options
A. are cross-linked molecules.
B. soften on application of heat.
C. are solvent soluble.
D. none of these.
Show Answer
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Discuss
Correct Answer: are cross-linked molecules.
3. A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of
Options
A. siloxane elastomers.
B. polyamides.
C. vinyl polymers.
D. urea-formaldehyde resins.
Show Answer
Scratch Pad
Discuss
Correct Answer: urea-formaldehyde resins.
4. Nylon-6 is a
Options
A. polyamide
B. thermosetting resin
C. polyester
D. none of these
Show Answer
Scratch Pad
Discuss
Correct Answer: polyamide
5. Silicone is a/an
Options
A. monomer
B. inorganic polymer
C. thermoplastic material
D. a natural polymer
Show Answer
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Discuss
Correct Answer: inorganic polymer
6. Which of the following is the lowest cost plastic commercially available?
Options
A. Polythene
B. Teflon
C. Bakelite
D. PVC
Show Answer
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Discuss
Correct Answer: Polythene
7. Polymerisation of poly functional monomers produces polymers having
Options
A. good machanical strength
B. low viscosity
C. low melting point
D. none of these
Show Answer
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Discuss
Correct Answer: good machanical strength
8. Branched chain polymers compared to linear polymers have higher
Options
A. density.
B. tensile strength.
C. melting point.
D. degree of irregularity in atomic packing.
Show Answer
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Discuss
Correct Answer: degree of irregularity in atomic packing.
9. Polyurathane can not be used to make
Options
A. automobile cushion
B. thermal insulation in refrigerator
C. coating and adhesive
D. fibre reinforced plastic (FRP)
Show Answer
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Discuss
Correct Answer: fibre reinforced plastic (FRP)
10. __________ practically possess no elasticity.
Options
A. Vulcanite or ebonite
B. Spandex fibre
C. Polysulphide rubber
D. Epoxy resin
Show Answer
Scratch Pad
Discuss
Correct Answer: Vulcanite or ebonite
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