Polymer structures featuring polyethylene glycol (PEG), with biodegradable or biocompatabile segments offering micelluar, nano and microsphere morphologies which are useful for controlled release formulations. Molecular weights of blocks controlled by GPC. Alternative structures can be synthesized.

Polymer structures featuring polyethylene glycol (PEG), with biodegradable or biocompatabile segments offering micelluar, nano and microsphere morphologies which are useful for controlled release formulations. Molecular weights of blocks controlled by GPC. Alternative structures can be synthesized.

Polymer structures featuring polyethylene glycol (PEG), with biodegradable or biocompatabile segments offering micelluar, nano and microsphere morphologies which are useful for controlled release formulations. Molecular weights of blocks controlled by GPC. Alternative structures can be synthesized.

Polymer structures featuring polyethylene glycol (PEG), with biodegradable or biocompatabile segments offering micelluar, nano and microsphere morphologies which are useful for controlled release formulations. Molecular weights of blocks controlled by GPC. Alternative structures can be synthesized.

Polymer structures featuring polyethylene glycol (PEG), with biodegradable or biocompatabile segments offering micelluar, nano and microsphere morphologies which are useful for controlled release formulations. Molecular weights of blocks controlled by GPC. Alternative structures can be synthesized.

Polymer structures featuring polyethylene glycol (PEG), with biodegradable or biocompatabile segments offering micelluar, nano and microsphere morphologies which are useful for controlled release formulations. Molecular weights of blocks controlled by GPC. Alternative structures can be synthesized.

Polymer structures featuring polyethylene glycol (PEG), with biodegradable or biocompatabile segments offering micelluar, nano and microsphere morphologies which are useful for controlled release formulations. Molecular weights of blocks controlled by GPC. Alternative structures can be synthesized.