用乙二醇(EG)置换水分散TiO2体系中的H2O得到TiO2的EG体系,激光粒度仪测试发现TiO2在EG中的分散尺寸与在H2O中相同.以对苯二甲酸二甲酯(DMT)和EG为原料,原位聚合制备了TiO2/PET复合材料.用扫描电镜(SEM)观察了TiO2在PET中的分散性,考察了TiO2含量对TiO2/PET复合材料力学性能、热稳定性和UV吸收性能的影响,结果发现:TiO2含量为0.5%～1.0%时材料的拉伸断裂强度和断裂伸长提高,而含量为2.0%～3.0%时材料的断裂强度和断裂伸长下降,结合对拉伸断口形貌的观察,推断TiMO2与基体PET间存在着较强的作用.由于TiO2极高的表面能,TiO2/PET复合材料在350～380nm处的UV吸收性能随TiO2含量的增加而增强,热稳定性变化不大.
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