PMMA dissolves in chloroform, dichloromethane, acetone, cyclohexanone etc. But you included egdma - ethylene glycol dimethacrylate - which is a cross-linker. With enough cross links your material is insoluble - will only swell. The cut-off is often around 3% - so if you had more than 3% egdma you may not be able to dissolve. TEOS may cross link by exchange with the PMMA - or it may react with itself to generate silica materials.

Thank you James E Hanson for your valuable response.