Propagation (1 Viewer)

[KungPow]

What exactly occurs during this step? Is it just the monitoring of the process to ensure desired results? Or does something else happen?

 

[xeriphic]

the resulting ethene molecule from the initiation stage is now a free radical, which attacks the double bonds of other ethene molecules as a result of an addition of a new group, which makes the polymer chain long

 

[KungPow]

So you're saying propagation is just the stage where the polymerisation occurs?

 

[Paroissien]

Yeah it is a stage in the polymerisation of ethene.
Has nothing to do with monitoring

 

[xeriphic]

polymerisation consists of three stages

initiation
propagation
termination

so yups XD lol

 

[mazza_728]

do i need to know this cause i dont??!?!

 

[:: ck ::]

yes u do for a band 6 answer for chem

 

[Gesus]

hmm, i never knew it was a 3 step process,
i always just wrote free radical reacts with a ethene molecule, forming a activated monomer. then the activated monomer reacts with another monomer forming a dimer, this process continues untill the the chain is stopped by a free radical joining the group or where two chains join together

 

[KungPow]

I was actaully asking what happens during the propagation stage. I guess I can cut out the quality control stuff then. Damn tutor, yet again!

Gesus: dimer?

 

[Paroissien]

You don't actually have to name the stages. Just describe the overall process

 

[xeriphic]

yer you don't, I do it because helps me remember XD lol

 

[Shards]

Propogation stage: the activated monomer adds onto another ethene monomoer to produce a dimer radical
this process continues and the chain builds longer

 

[Paroissien]

I've never heard that term 'dimer' before
Where did you get it from?

 

[Shards]

you've heard of polymer, right? (well obv)

poly --> many

di --> two

capeesh?

 

[Paroissien]

Fair enough. Never thought of it like that, seems kinda over-simplified, but ah well