on preparing a partially ionic polymer with PEG side-chains I have
obtained what appears to be an amorphous polymer with a rather low glass
transition temperature. This is seen from its ability to form homogenous
films and its appearance in general. I have not yet made thermal
measurements, DSC is currently down.
On redissolving, a large part goes into solution but some of it forms a
rather insoluble precipitate. This melts on heating to give the same
amorphous behaviour as before.
My theory is that on adding solvent, crystallisation is somehow promoted
by adding solvent and the crystalline parts are hardly soluble. I am not
sure whether this is a likely explanation, though and welcome any
- posted 17 years ago