Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
1H-NMR spectra of mPEG–PCL-g–PEI with three different compositions. (A) mPEG–PCL-g–PEI with composition 2000-2000-2000; (B) mPEG–PCL-g–PEI with composition 2000-6000-2000; (C) mPEG–PCL-g–PEI with composition 5000-2000-2000.
Abbreviations: 1H-NMR, proton nuclear magnetic resonance; PEG, polyethylene glycol; PCL, poly ɛ-caprolactone; PEI, polyethylenimine.
