Using styrene,methyl acrolein as raw materials,polystyrene-acrolein was synthesized by dispersion polymerization. Then styrene-acrolein-aminothiourea polymer was synthesized by the reaction between polystyrene-acrolein and aminothiourea. Titanium dioxide nanoparticles were prepared using butyl titanate as raw material. The polymer-titanium dioxide nanoparticles composite as solid phase extraction packing was prepared by means of solution co-blending method. The structure and the thermal property of synthesi...