杨景辉,孔凡滔,马新胜.SiO2含量对钛/硅复合氧化物聚酯催化剂性能的影响[J].分子催化,2007,(6):515-519
SiO2含量对钛/硅复合氧化物聚酯催化剂性能的影响
The Effect of Silica on Catalytic Properties of Titania/Silica Mixed Oxides in Preparation of Poly (ethylene terephthalate)
投稿时间:2006-09-08  修订日期:2007-04-17
DOI:
中文关键词:  钛/硅催化剂,缩聚,聚对苯二甲酸乙二醇酯
英文关键词:Titania/Silica,Polycondensation,Poly(ethylene terephthalate)
基金项目:上海市青年科技启明星计划(04QMX1478),上海市科委科技攻关计划(055211009)资助项目.
杨景辉  孔凡滔  马新胜
华东理工大学国家超细粉末工程研究中心 上海200237
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中文摘要:
      研究了钛/硅复合氧化物聚酯催化剂中,二氧化硅含量对聚对苯二甲酸乙二醇酯缩聚反应的影响.催化剂XRD谱图表示,增加二氧化硅含量会抑制二氧化钛的结晶.随着二氧化硅含量的增加,钛/硅催化剂表面Lewis酸的数目和强度都减小.比表面积和Lewis表面酸性都会影响钛/硅催化剂的活性.
英文摘要:
      The effect of silica on catalytic properties of Titania/Silica Mixed Oxides in Preparation of Poly(ethylene terephthalate)was investigated.The X-ray diffraction pattern showed that the addition of silica to titania restrained the crystallization of titania.The amount and strength of Lewis acid of titania/silica decreased with increase of content of silica.Both Specific surface area and surface Lewis acid had an effect on catalytic activity of titania/silica.
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