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Chemical Engineering - Polymer Technology

Exercise : Polymer Technology - Section 6
36.
Contact lenses for eyes are made of perspex, which is nothing but
polymethylmethacrylate
polystyrene
unsaturated polyester
polypropylene
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
The repeating units of PTFE are
Cl2CH-CH3
F2 C = CF2
F3 C-CF3
FClC = CF2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
Low pressure Zeigler process of polythene manufacture
employs a pressure of 30 kgf/cm2.
achieves an yield of 95-98% based on ethylene.
produces very low density polythene.
does not use any catalyst for polymerisation.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
__________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol).
Unsaturated polyester
Alkyd resins
Saturated polyester
Amino resins
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
Which of the following is an elastomer ?
Thiokol
Phenol formaldehyde
Urea formaldehyde
Polystyrene
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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