Free radical polymerisation (paco)

?
what 3 stages is FRP divided into
initiation, propagation, termination
1 of 15
initiation
initiators react to create radicals needed to initiate the polymerisaton
2 of 15
propagation
radicals react to create a monomer radical, which reacts with another monomer to create a dimer and so on until a polymer of high MW is formed
3 of 15
termination
two polymer radicals react to give a new species with no radicals
4 of 15
FRP pros
radicals are highly reactive-polymers are made quickly/ highly tolerant to functional groups/ highly tolerant to solvent and concentration/ doesn't require specialist equipment
5 of 15
FRP cons
it is hard to control reactivity of the polymer
6 of 15
initiators
azo compunds/ peroxides/ persulfates/aromatic acetophenones
7 of 15
monomers
almost any molecule containing a c=c double bond
styrenes/acrylates/methacrylates/acrylamides/methylacramides
8 of 15
propagation 2
in. adds to least substituted double carbon/ head-to-tail likely most likely due to reduced steric crowding
9 of 15
DP
([M]*p)/([in.]*Ie)
10 of 15
rate of polymerisation (becomming polymers)
aromatics>dienes>alpha,beta-unsaturated ketones>acrylonitrile>acrylamides>acrylates>vinyl chloride>aliphatic vinyl>vinyl esters
11 of 15
rate of polymerising ( how they react as polymers)
aromatics<dienes<alpha,beta-unsaturated ketones<acrylonitrile<acrylamides<acrylates<vinyl chloride<aliphatic vinyl<vinyl esters
12 of 15
methods of termination
coupling/ disproportionation
13 of 15
other side reactions
transfer to polymer/ chain-transfer agents
14 of 15
consequences of side reactions
no control over DP/ no control over topology/ no control over end groups
15 of 15

Other cards in this set

Card 2

Front

initiation

Back

initiators react to create radicals needed to initiate the polymerisaton

Card 3

Front

propagation

Back

Preview of the front of card 3

Card 4

Front

termination

Back

Preview of the front of card 4

Card 5

Front

FRP pros

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all paco polymers resources »