Question

High density polyethylene (HDPE) can be prepared from ethylene by:

• A. Ziegler-Natta process.
• B. Heating with peroxides.
• C. Condensing in sealed tubes.
• D. Condensing with styrene.

Answer 1

The correct option is A Ziegler-Natta process.

High density polythene is synthesised from ethylene by Ziegler-Natta polymerisation in the presence of triethylaluminium and titanium tetrachloride (Ziegler-Natta catalyst) at a temperature of 333K (${600}^{0}C$) to 343K (${700}^{0}C$) and under a pressure of 6-7 atm.

Hence, option $A$ is correct.