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Chemical Engineering - Polymer Technology

Exercise : Polymer Technology - Section 6
1.
Polypropylene compared to polythene is
harder
stronger
lighter
all (a), (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
The rate controlling step in the manufacture of silicone rubber is the
polymer termination step.
condensation of siloxane to silicone.
initial hydrolysis of silicone monomer.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
Buna-S is also called
polyurathane
SBR
teflon
bakelite
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
Diphenylamine is added to rubber to
valcanise it.
protect it from deterioration on exposure to air.
make it non-inflammable.
make it thermosetting.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
Vulcanisation of raw rubber makes it
soft
less elastic
plastic
tacky
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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