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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: Zachery.Leyden on June 19, 2020, 11:30:33 PM

Title: Addition Polymerisation (Polyethylene)
Post by: Zachery.Leyden on June 19, 2020, 11:30:33 PM

Currently Doing an Assignment for Polymerisation,

Can Someone Clarify the formation process of HDPE (ie Initiation, Propagation, Termination), specifically the role of the Ziegler-Natta aluminium titanium catalyst in the initiation phase of polymerisation. Is, like in formation process of LDPE, a peroxide free radical initiator still used in addition with the catalyst? or does the catalyst itself initiate the polymerisation process by producing a free radical site on the ethylene monomer unit.

Kind Regards,

Zac  :)  ;D

Title: Re: Addition Polymerisation (Polyethylene)
Post by: hollytara on June 20, 2020, 12:07:35 AM

Ziegler-Natta processes proceed through organometallic intermediates, not radicals.