Question

What do you understand by high density polythene?

Answer 1

1. High density polythene (HDPE) is a polymer formed by addition polymerisation of ethene; its chains are largely linear with very little branching.
2. The linear structure gives HDPE high density and crystallinity, making it strong, rigid, and chemically resistant.
3. It is manufactured using catalysts such as titanium tetrachloride (TiCl₄) with organometallic co-catalysts.
4. Common uses are bottles, pipes, containers, and packaging.