Polyethyleneimine (PEI) ndi polima wokhala ndi nthambi zambiri wopangidwa ndi ethyleneimine monomers.Ndi mawonekedwe ake a unyolo wautali, PEI imawonetsa zomatira zabwino kwambiri, zomwe zimapangitsa kuti ikhale chisankho choyenera pazogwiritsa ntchito zosiyanasiyana, kuphatikiza zokutira zamapepala, nsalu, zomatira, ndikusintha pamwamba.Kuphatikiza apo, chikhalidwe cha PEI cha cationic chimalola kuti chimangirire ku magawo omwe ali ndi vuto, kukulitsa kusinthasintha kwake m'mafakitale osiyanasiyana.
Kuphatikiza pa zomatira zake, PEI imawonetsanso mphamvu zapadera zosungira, zomwe zimakhala zopindulitsa m'malo angapo monga kuthira madzi onyansa, kugwidwa kwa CO2, ndi catalysis.Kulemera kwake kwa maselo kumapangitsa kuti pakhale kutsatsa koyenera komanso kosankha, ndikupangitsa kuti ikhale gawo lamtengo wapatali pakuyeretsa mpweya ndi zakumwa.