中文摘要：

合成了一种基于TiO2/SiO2溶胶的高活性PET缩聚催化剂,用电子探针显微镜（EPMA）和热重分析（TGA）表征了催化剂的组分,结果与理论值符合.X射线光电子能谱（XPS）结果证实,催化剂中加入的己内酰胺与Ti存在配位作用,极大地提高了催化剂的活性.所制备的催化剂催化聚合得到的PET性能远优于用传统锑系催化剂制备的PET材料.

英文摘要：

A novel catalyst for the polycondensation of PET based on TiO2/SiO2 sol was synthesized.The composition of the catalysts was characterized by electron probe micro-analyzer（EPMA） and thermogravimetric analysis（TGA） methods.The results indicate that the composition of the catalysts can be well controlled and match well with theoretical values.X-ray photoelectron spectroscopy（XPS） results reveale that caprolactam added into the catalyst has coordinative effects with Ti and gives the catalyst ultra-high activity.The PET products catalyzed by the catalyst with caprolactam had far better properties than those synthesized using traditional antimony based catalysts.