Quick Question on LDPE (1 Viewer)

[Jackson94]

Is it correct to say that LDPE forms by addition polymerisation that uses a free radical initiator, if this is true why does this cause there to be branching???

 

[Riproot]

Wait, doesn't LDPE have high branching?

Edit: just re-read it.
The branching is random so there is a lot of it. Also, it's under less pressure so there is more room for branching.

 

[rolpsy]

During free radical polymerisation the radical end often curls back on part of the existing chain, exposing a hydrogen to an electron. The hydrogen atom is subsequently captured, leaving the radical in the middle of the chain. This is called ‘backbiting’, and occurs about every 50 atoms, causing branding.

obviously there's supposed to be more carbons/hydrogens (about 50) between the hydrogen and electron, but you get the idea

 

[Jackson94]

Thank you very much that was very helpful

 

[study-freak]

During free radical polymerisation the radical end often curls back on part of the existing chain, exposing a hydrogen to an electron. The hydrogen atom is subsequently captured, leaving the radical in the middle of the chain. This is called ‘backbiting’, and occurs about every 50 atoms, causing branding.

obviously there's supposed to be more carbons/hydrogens (about 50) between the hydrogen and electron, but you get the idea

except that the curly arrow doesn't look right... just put it without the arrow as it's gonna get messy and HSC doesn't require it.

 

[someth1ng]

Yeah, the back-biting one is correct.