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 ~2,500) 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).
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): ~2,500 Mw in free base form. Nominal 4,000 Mw in hydrochloride salt form. (Comparable to Cat. #24313 - Polyethylenimine, Linear, Mw 2,500 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" 4,000
(Equivalent to MW ~2,500 in Free Base Form)
Analysis of Polyethylenimine "Max" 4,000
(Equivalent to MW ~2,500 in Free Base Form)
| |
%C |
%H |
%N |
%Cl |
Total |
| Theoretical (based on 5.4% water content) |
28.6 |
7.8 |
16.7 |
42.2 |
95.30 |
| Found by elemental analysis |
28.99 |
7.47 |
16.52 |
42.06 |
95.042
|