Been trying for days to crack this sure it staring me in the face understand princple just can't work out the one I have been given to do.

I have to polymerize
CH2=CH-CH-OH with a CH3 under CH next to the OH
I need to identify the monomer unit and what type of polymerization formed it.

I have been working on it being a additions polymerization as there is a alkene present but can't work out how it is formed, perhaps I am going in wrong direction. Really want 2 understand this don't want to b beaten

Would b very very grateful 4 some help