Influence of Functionalized Graphene Sheets on Modulus and Glass Transition of PMMA
Additional Document Info
An experiment was conducted to show the influence of functionalized graphene sheets on modulus and glass transition of polymethyl methcrylate (PMMA). Glass transition temperatures of as-received PMMA (RPMMA), PMMA precipitated from THF solution using methanol as antisolvent (PMMA) and FGS-PMMA nanocomposites with various FGS loadings were determined using differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). A significant amount of additives is generally used in suspension and emulsion polymerization. Surfactants are used to stabilize methyl methacrylate monomer (MMA) droplets in the suspension during the polymerization process. To obtain pure PMMA, the surfactant has to be removed by washing the product. All the FGS/PMMA/THF solutions were magnetically stirred for another hour in an ice bath. Each solution was precipitated in 300 mL of methanol and then the precipitate was collected by suction filtration through a poly(tetrafluoroethylene) (PTFE) membrane. The second heating curves were collected and reported in this study.