TiO2/HIPE nanometer composites have been prepared by surface pre - treatment of nano - TiO2; selecting special macromolecule dispersing agent(TAS) and master batch manufacturing technology. The results show that when the nano- TiO2 content is 2%, the notched impact strength, tensile strength and elastic modulus of TiO2/HIPS nanometer composites are increased to maximum. Hardness, heat distortion temperature and flame retardant of HIPS are also obviotsly improved while the nano - TiO2 contents are increased.%采用溶胶一凝胶法制备纳米TiO2，并对纳米TiO2进行表面处理，在大分子分散剂存在下，通过母料法工艺制备了纳米TiO2／HIPS复合材料。实验结果表明，制备的纳米TiO2／HIPS复合材料的缺口冲击强度、拉伸强度和弹性模量在纳米TiO2含量为2％时上升为最大值，且复合材料的硬度、耐热性能、阻燃性能随纳米TiO2含量的增加而提高。
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