Figure 7.
TEM micrographs of the dispersions of (a) PU-35, (b) PU-40, (c) PU-45, and (d) PU-50; (hard/soft segment molar ratio of 3.5, 4.0, 4.5, and 5.0, respectively) [41]. Copyright © (2015) Pleiades Publishing.
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.