邻苯二甲酸二正丁酯对丙烯聚合催化剂中Ti中心电子状态的影响被引量：8

Effect of Di-n-Butyl-Phthalate as Internal Donor on Electronic State of Ti Species in TiCl_4/MgCl_2 Catalyst for Propylene Polymerization

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摘要采用光电子能谱技术对不同内给电子体邻苯二甲酸二正丁酯(DNBP)含量的TiCl4/MgCl2催化剂的结构进行了表征。表征结果显示,在TiCl4/MgCl2催化剂中,DNBP能向Ti中心提供电子从而影响Ti中心的电子状态;随TiCl4/MgCl2催化剂中DNBP含量的增加,Ti中心的Ti2p3/2结合能逐渐向低能区位移,并最终稳定在458.3eV。采用傅里叶变换红外光谱和热重分析手段推测了DNBP在TiCl4/MgCl2催化剂中影响Ti中心电子状态的方式。 A series of TiCl4/MgCl2 Ziegler - Natta catalysts with different di - n - butyl phthalate （DNBP） contents were characterized by means of X- ray photoelectron spectroscopy （XPS）, FTIR and TG -DTA. DNBP as internal donor influences electronic state of Ti species in TiCl4/MgCl2 catalysts by providing electrons to the species, which makes the binding energy of Ti 2p3/2 peak shifting to lower energy regions. Binding energy of Ti 2p3/2 on Ti species decreases with increase of DNBP content in TiCl4/MgCl2 catalyst and eventually becomes stable at 458.3 eV despite further increase of DNBP content. The way by which DNBP influences electronic state of Ti species in TiCl4/MgCl2 catalyst was suggested.

作者宋阳高明智毛炳权

机构地区北京化工大学理学院中国石油化工股份有限公司北京化工研究院

出处《石油化工》 EI CAS CSCD 北大核心 2007年第2期146-150,共5页 Petrochemical Technology

关键词 ZIEGLER-NATTA催化剂内给电子体邻苯二甲酸二正丁酯钛电子状态聚丙烯 Ziegler - Natta catalyst internal donor di - n - butyl - phthalate titanium electronic state polypropylene

分类号 TQ426.8 [化学工程]

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