Silicone based polymer that can be functionalised on one end?

I am looking for a silicone based polymer (think PDMS but I need to do some chemical reactions with it) where I can attach on one side (or both, I am not sure yet) another molecule that has a carboxylic acid at the end or an amine. Maybe some of you know of a PDMS derivative that's functionalised at the end?


Many thanks in advance.


