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Chemical Engineering
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Polymer Technology
Comments
Question
Pick out the correct statement.
Options
A. Plastics are good conductors of heat and electricity.
B. All the polymers are highly crystalline in nature
C. Polymers can be vaporised by heating to a very high temperature.
D. The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of polymerisation.
Correct Answer
The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of polymerisation.
Polymer Technology problems
Search Results
1. Which of the following is stretched into fibres?
Options
A. Saturated polyester
B. Unsaturated polyester
C. Isoprene
D. Bakelite
Show Answer
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Discuss
Correct Answer: Saturated polyester
2. Low density polythene as compared to high density polythene is
Options
A. harder
B. tougher
C. chemically inert
D. more flexible
Show Answer
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Discuss
Correct Answer: more flexible
3. Perspex can be used as a substitute of glass. Its monomer is
Options
A. methyl methacrylate
B. DMT
C. butadiene
D. tetrafluroethylene
Show Answer
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Discuss
Correct Answer: methyl methacrylate
4. Polymethyl methacrylate, which is an acrylic resin, is also called
Options
A. thiokol
B. plexiglass or lucite
C. dacron
D. teflon
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Correct Answer: plexiglass or lucite
5. __________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.
Options
A. Fibrous
B. Leathery
C. Rubbery
D. Hard
Show Answer
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Discuss
Correct Answer: Leathery
6. Viscosity of a polymer solution or melt
Options
A. decreases with increase in molecular weight.
B. decreases with increase in temperature.
C. increases with increase in temperature.
D. does not vary with temperature rise.
Show Answer
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Correct Answer: increases with increase in temperature.
7. __________ is an addition polymer
Options
A. Nylon
B. Bakelite
C. Polythene
D. none of these
Show Answer
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Discuss
Correct Answer: Polythene
8. Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are
Options
A. 5°C and 1 kgf/cm
2
.
B. - 20°C and 1 kgf/cm
2
.
C. 0°C and 1 kgf/cm
2
.
D. 0°C and 3 kgf/cm
2
.
Show Answer
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Discuss
Correct Answer: 5°C and 1 kgf/cm
2
.
9.
Nylon 6
as compared to
nylon 6, 6
has lower
Options
A. abrasion resistance.
B. thermal stability.
C. adhesion to rubber.
D. hardness.
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Correct Answer: abrasion resistance.
10. Which of the following is not a polymer of two monomers?
Options
A. Teflon
B. Bakelite
C. SBR
D. None of these
Show Answer
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Discuss
Correct Answer: Teflon
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