Abstract: Influence of blending procedure on the toughness of PP/POE/SiO2 composites was studied.The samples were obtained through injection molding after extrusion blending of different procedures:(i) PEE and Siq were blended first and the mixture blended with PP; (ii) PP and SiO2 were blended first and the mixture blended with PEE;(iii) PEE and PP were blended first and the mixture was blended with Siq;(iv) the three components were blended at the same time. the toughness of the composites was in the order(i)>(ii>(iii) >(iv).If a composite was extrusion blended one more time, better toughness was obtained.

Key words: blending technology, nucleus-shell structure, interface, impact strength