Question
Ethylene glycol.
✓
Answer
Ethylene glycol 
is used in the preparation of polyester (terylene or dacron).
Terylene is polyester fibre formed by the polymerization of terephthalic acid and ethylene glycol.
Terylene is obtained by condensation polymerization of ethylene glycol and terephthalic acid in presence of catalyst zinc acetate and antimony trioxide at high temperature.
Properties :
is used in the preparation of polyester (terylene or dacron).Terylene is polyester fibre formed by the polymerization of terephthalic acid and ethylene glycol.
Terylene is obtained by condensation polymerization of ethylene glycol and terephthalic acid in presence of catalyst zinc acetate and antimony trioxide at high temperature.
Properties :
- Terylene has relatively high melting point (265 °C)
- It is resistant to chemicals and water.
- It is used for making wrinkle-free fabrics by blending with cotton (terycot) and wool (terywool), and also as glass reinforcing materials in safety helmets.
- PET is the most common thermoplastic which is another trade name of the polyester polyethylenetereph- thalate.
- It is used for making many articles like bottles, jams, packaging containers.
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Complete the chart:
→| Reaction | Name of Catalyst used |
| 1. Hydrogenation of oil (Hardening) | ………………………………… |
| 2. Haber’s process of manufacture of ammonia | ………………………………… |
| 3. Manufacture of HDPE polymer | ………………………………… |
| 4. Manufacture of $H_2S0_4$ by contact process | ………………………………… |
| 5. Fischer-Tropsch process (synthesis of gasoline) | ………………………………… |