Polyethylenimine “Max”, (nominally Mw 40,000*) - High Potency Linear PEI
(Equivalent to Mw 25,000 in Free Base Form)

High Potency Linear Polyethylenimine - A New Cationic Polymer

Polysciences, Inc. is pleased to announce the availability of a nearly fully hydrolyzed linear polyethylenimine with longer contiguous ethyleneimine segments. Polyethylenimine "Max" is built from the same polymer backbone (Mw 25,000) as the popular linear polyethylenimine. Despite the fact N-deacylation reactions are notoriously difficult, our new linear polyethylenimine material is believed to contain more than 11% additional free (protonatable) nitrogens than our original linear polyethylenimine material (Cat. # 23966). Estimates¹ of the average number of repeating ethyleneimine units ranges to around 581 segment, resulting in dramatically increased lengths of protonatable nitrogens. Our material is supplied as a hydrochloride salt for ease of handling but may be converted into the free amine form by neutralization with base.

Properties

Appearance: White to off-white free flowing solid

*Molecular Weight (Mw): 25,000 Mw in free base form. Nominal 40,000 Mw in hydrochloride salt form. (Comparable to Cat. #23966 - Polyethylenimine, Linear, Mw 25,000 which is not in the hydrochloride salt form)

Chemical Structure: Hydrochloride salt of linear polyethylenimine

Solubility: Highly water soluble in hydrochloride salt form

Insoluble in: Common organic solvents (ethanol, acetone, tetrahydrofuran)

Soluble in: Cold and room temperature water

For the use of PEI in an antimicrobial coating, see Klibanov et. al. Proceedings of the National Academy of Sciences, vol. 102, no. 16, 5679-5684 (2005). Published on-line prior to printing on 4/11/05.

FTIR Spectrum of Polyethylenimine "Max" 40,000
(Equivalent to Mw 25,000 in Free Base Form)

Elemental Analysis of Polyethylenimine "Max" 40,000
(Equivalent to Mw 25,000 in Free Base Form)