-Triethoxysilylpropylamine (APTES) was grafted onto the surface of attapulgite rod crystals to get the modified particles AT-APTES

and then a redox initiating system was constructed with the primary amino groups on the surface of AT-APTES particles and the ammonium persulphate in the solution

the surface-initiated graft polymerization of methyl methacrylate was realized and the hybrid particles AT-g-PMMA with a high grafting degree of 29.4% were obtained at last.The hybrid particles were characterised by FTIR

Raman

TEM and TGA.The results showed that APTES was grafted onto the surface of attapulgite rod crystals and PMMA was grafted from the surface of AT-APTES particles successfully.The effects of some factors on the grafting polymerization of MMA were investigated mainly.The experimental results show that the optimal temperatures is of the surface-initiated graft polymerization is 65 ℃ and the decrease of grafting degree at higher temperatures is due to the heat decomposition of ammonium persulphate.The quantity of APS which accounted for 1 wt% of the monomer mass was chosen as the most reasonable amount

and the appropriate monomer concentration 6 wt% of the water mass.In addition

the grafted polymer layer would restrain subsequent grafting polymerization and polymerization location would transfer from the surface of attapulgite to half polymer micelle with higher temperature and excessive monomer or ammonium persulphate.