Category: Transient Plane Source
Keywords: AFM, atomic force microscopy, Atomic Force Microscopy (AFM), differential scanning calorimetry, Differential scanning calorimetry (DSC), DMA, DSC, Dynamic Mechanical Analysis, Dynamic Mechanical Analysis (DMA), FT-IR, Gel Permeation Chromatography, Gel Permeation Chromatography (GPC), GPC, MAS-NMR, nanocomposites, TEM, TGA, Thermal Conductivity, Thermal Gravimetric Analysis, Thermal Gravimetric Analysis (TGA), Transmission electron microscopy, Transmission electron microscopy (TEM)
Abstract: PMMA/silica mesocomposites (PSM) and nanocomposites (PSN) were synthesized by incorporating vinyl-modified mesoporous silica (VMS) or silica particles into the poly (methyl methacrylate). The prepared composites were characterized by TEM and GPC. Thermal conductivity and gas permeability measurements were performed on the composites using a thermal constants analyzer and Yanco GTR-31 gas permeability analyzer, respectively. It was determined that an increase in the content of nanoscale silica particles improved the mechanical strength, thermal stability, surface hydrophobicity, and surface roughness while decreasing the optical clarity. In contrast to this, PSM membranes containing the same silica loading were found to be more thermally insulating and to allow for better gas permeation.
Reference: Microporous and Mesoporous Materials, 131 (2010) 192-203