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.
Carbon-13 nuclear magnetic resonance (13C NMR) spectrum of poly(ɛ-caprolactone) (PCL), poly(propylene adipate) (PPAd), and their copolymer PPAd/PCL 65/35 weight/weight (A) and 13C-NMR spectrum at region 173 ppm of PPAd/PCL 65/35 weight/weight (B).
