Chemical Engineering - Polymer Technology
Exercise :: Polymer Technology - Section 6
| 1. |
Polypropylene compared to polythene is |
| A. |
harder | | B. |
stronger | | C. |
lighter | | D. |
all (a), (b) and (c) |
Answer: Option D
Explanation:
|
| 2. |
The rate controlling step in the manufacture of silicone rubber is the |
| A. |
polymer termination step. | | B. |
condensation of siloxane to silicone. | | C. |
initial hydrolysis of silicone monomer. | | D. |
none of these. |
Answer: Option C
Explanation:
|
| 3. |
Buna-S is also called |
| A. |
polyurathane | | B. |
SBR | | C. |
teflon | | D. |
bakelite |
Answer: Option B
Explanation:
|
| 4. |
Diphenylamine is added to rubber to |
| A. |
valcanise it. | | B. |
protect it from deterioration on exposure to air. | | C. |
make it non-inflammable. | | D. |
make it thermosetting. |
Answer: Option B
Explanation:
|
| 5. |
Vulcanisation of raw rubber makes it |
| A. |
soft | | B. |
less elastic | | C. |
plastic | | D. |
tacky |
Answer: Option B
Explanation:
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