Organic–inorganic hybrid materials3 Characterization and degradation of poly(imide–silica) hybrids doped with LiCF 3SO 3

Abstract

Lithium salts-containing hybrids were prepared by hydrolysis-condensation of tetramethoxysilane (TMOS) in solution in N, N-dimethylacetamide(DMAc) containing 10 wt% trifluoromethanesulfonate (LiCF 3SO 3) and (3-aminopropyl)methyl diethoxysilane (APrMDEOS) terminated amic acid. Infrared (IR), 29Si and 13C CP/MAS nuclear magnetic resonance (NMR) spectroscopy, thermo-mechanical analysis (TMA), and thermogravimetric analysis (TGA) were used to study various hybrids. The spin–spin relaxation time T 2 of the hybrid was studied to probe the role of the salt. The apparent activation energy E a for degradation of hybrids in air was evaluated by the van Krevelen method.