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Polymer Technology
Comments
Question
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.
Correct Answer
increases with increase in temperature.
Polymer Technology problems
Search Results
1. 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.
Show Answer
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Discuss
Correct Answer: The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of polymerisation.
2. 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
3. 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
4. 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
5. Polymethyl methacrylate, which is an acrylic resin, is also called
Options
A. thiokol
B. plexiglass or lucite
C. dacron
D. teflon
Show Answer
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Discuss
Correct Answer: plexiglass or lucite
6. __________ 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
7. 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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Correct Answer: 5°C and 1 kgf/cm
2
.
8.
Nylon 6
as compared to
nylon 6, 6
has lower
Options
A. abrasion resistance.
B. thermal stability.
C. adhesion to rubber.
D. hardness.
Show Answer
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Correct Answer: abrasion resistance.
9. 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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Correct Answer: Teflon
10. Which of the following is not a polyolefin?
Options
A. Polystyrene
B. Polypropylene
C. Neoprene
D. None of these
Show Answer
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Discuss
Correct Answer: Neoprene
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