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Explain the manufacture of HDPE (High De...

Explain the manufacture of HDPE (High Density Polythene).

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It is prepared by heating ethene in a hydrocarbon solvent at 333 to 343K temperature and 6-7 atmospheric pressure in pressence of Zieguler Nutta Catalyst (Triethyl aluminium + Titanium tetrachloride).
`n CH_(2)=CH_(2) underset("Zeigler Nutta Catalyst")overset("6-7 atm 333K -343K")to underset("Polythene HDPE")([-CH_(2)-CH_(2)-]_(n))`
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