PEI-b(20k)-mPEG(1k) is comprised of polyethylene glycol (PEG) and poly(ethylene imine) (PEI) with a terminal hydroxyl group. The hydrophilic PEG increases solubility in aqueous media. PEI has temperature dependent solubility in aqueous media and finds many applications in industry. PEI-b-mPEG can be used in the development of lipid nanoparticles. The terminal hydroxyl group enables further derivatization or replacement with other reactive functional groups.
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