The (PMMA)/SiO2 nano composites was prepered by in situ polymerization

and the properties of this nano composites was studied by the SEM

DMA

TGA and so on. The obtained reveal that the inorganic component SiO2 which has been interfaially modified was dispersed evenly in the composites

while the unmodified ones tend to agglomerated

and the mechanical properties of treated SiO2 filled PMMA is prior to the untreated noes.It was surposed that the SiO 2 particles formed as crosslink point in the matrix because the good interfacial adhesion with PMMA while untreated ones less to do so comparely.Futhermore

the contents of the SiO2 component also have some influnence on the thermal stability

dynamic mechanical behavior

light effect and mechanical properties of the composites.