Figure 4.
Differential scanning calorimetry (DSC) curves of the three kinds of polyester films degraded for different times ((a)—PES; (b)—PBS; and (c)—PHS).
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.