methyl methacrylate ( MMA) and 2-hydroxy propyl methacrylate ( HPMA) were used to prepare SiO
2
/PMMA hybrid quasi-gels by sol-gel method .The hybrid quasi-gels were used to modify PP as filler .FT-IR 、XRD 、SEM and PLM were employed to study the structure of PP/SiO
2
hybrid nanocomposites and the relationships among property
structure and composition of these composites were studied at the same time .The results show that PMMA/SiO
2
hybrid quasi-gel can induce PP to form β crystal and minimize the spherulite size in PP .When the content of SiO
2
in PP/SiO
2
hybrid nanocomposite ( PSH) is 2 %( wt)
the toughness strength is increased by 81 % than pure PP .