Abstract:Mesoporous silica with two-dimensional (2D) hexagonal framework (SBA-15) and worm-hole framework
(MSU-J) were synthesized with different silica precursors and it was further employed to modify poly( methyl
methacrylate) (PMMA) to form novel SiO2 / PMMA hybrids with lower dielectric constant, higher thermal and mechanical
properties. The structural feature and physical properties of these materials were studied by XRD, SEM,
DSC and TGA. The results manifested that introduction of SiO2 into PMMA exhibited toughening and reinforcing effect
on the hybrid materials. The dielectric constants of the hybrid materials can be reduced from 2. 91 of the pure PMMA
to 2. 73 and 2. 64 by incorporating 4 wt% SBA-15 and 7 wt% MSU-J, respectively.
