TEM image of polyimide containing 15 vol% 40 nm BaTiO3 nanoparticles through in situ polymerization of 2,2-bis[4-(3,4-dicarboxyphenoxy) phenyl]propane dianhydride (BPADA) with 4,4′-oxydianiline (ODA). Film was solution cast and dried and completely imidized at elevated temperatures.
