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Polymer Technology
Comments
Question
Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin.
Options
A. resorcinol
B. phenol
C. para-cresol
D. melamine
Correct Answer
melamine
Polymer Technology problems
Search Results
1. __________ fibres are made of polyamides.
Options
A. Dacron
B. Nylon
C. Rayon
D. Orion
Show Answer
Scratch Pad
Discuss
Correct Answer: Nylon
2. Addition of stabiliser during PVC manufacture is done to
Options
A. improve its impact strength.
B. improve its elasticity.
C. reduce the melt viscosity & glass transition temperature.
D. prevent its thermal degradation.
Show Answer
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Discuss
Correct Answer: prevent its thermal degradation.
3. Flexible foam (for mattresses) are usually made of
Options
A. PVC
B. silicone rubber
C. polyurethanes
D. polyamides
Show Answer
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Discuss
Correct Answer: polyurethanes
4. Branched chair polymers as compared to linear polymers have
Options
A. higher melting point.
B. higher tensile strength.
C. lower density.
D. none of these.
Show Answer
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Discuss
Correct Answer: lower density.
5. Neoprene is rendered non-inflammable, because of
Options
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.
Show Answer
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Discuss
Correct Answer: the presence of chlorine atoms in its monomer.
6. Nylon-6 as compared to nylon-66 is
Options
A. harder.
B. more abrasion resistant.
C. having higher melting point.
D. none of these.
Show Answer
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Discuss
Correct Answer: none of these.
7. __________ is a copolymer.
Options
A. Nylon-66
B. Polyrophylene
C. PVC
D. Poly tetra flouro ethylene
Show Answer
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Discuss
Correct Answer: Nylon-66
8. Which of the following polymers shows the highest anti-tacking properties?
Options
A. Melamine formaldehyde resin
B. Phenolic resin
C. Epoxy resin
D. Alkyd resin
Show Answer
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Discuss
Correct Answer: Melamine formaldehyde resin
9. ? - glucose is the monomer of
Options
A. cellulose
B. starch
C. protein
D. none of these
Show Answer
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Discuss
Correct Answer: cellulose
10. Polyhexamethylene adipimide is also known as
Options
A. bakelite
B. nylon-66
C. epoxy resin
D. silicone rubber
Show Answer
Scratch Pad
Discuss
Correct Answer: nylon-66
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