Cyanate Ester Graphene Composites
AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIR/SPACE AND MISSILE PROPULSION DIV/PROPUL MATERIALS APPLICATIONS BR
Pagination or Media Count:
Graphene oxide produced by chemical oxidation formed stable dispersions in LECy cyanate ester matrix and edge functionalized graphite does not. High shear mixing followed by sonication was the best method for graphene oxide dispersion in LECy. Addition of 1 wt edge-functionalized graphite of LECy did not increase storage modulus but addition of 1 and 2 wt GO increased storage modulus below the Tg. Diffusion of water in LECy 1 wt GO was slower than pure LECy polycyanurate but equilibrium uptake was greater. SEM micrographs of composite fractured surfaces suggest that LECy cyanate resin matrix is ot covalently bonded to graphene oxide sheets. LECy 1 wt GO composite samples showed relatively good dispersion and low void content. Poor dispersion and large voids were present in LECy 5 wt composites.
- Organic Chemistry
- Laminates and Composite Materials