【摘要】 本文用红外（IR）光谱研究MgCl₂—C₄H₉OH—SiCl₄—TiCl₄体系聚烯烃高效催化剂,记录了催化剂制备各阶段的液相产物、固相产物及固相产物的汽油悬浮液的IR光谱。我们指定1065cm^-1、1036cm^-1和609、593cm^-1双峰相应为结合在MgCl₂上的C₄H₉OSiCl₃的υ_Si-O、υ_C-O和υ_as（S₁-Cl）吸收带;1058cm^-1、1033cm^-1、625cm^-1以及499、478cm^-1双峰相应为结合在MgCl₂上的C₄H₉OTiCl₃的υ_Ti-O、υ_C-O、δ_Ti-O以及υ_as（Ti-Cl）吸收带。实验结果支持了我们以前提出的关于这种催化剂体系的化学负载机理和活性中心性质的设想。更多还原

【Abstract】 Highly active supported Ziegler-Natta catalyst for olefin polymerization has been prepared by a modification of known method. MgCl2 was treated consecutively with n-C4H9OH, SiCl4 and TiCl4. The intermediate product in each step of the catalyst preparation has been characterized by means of IR spectra. The observed changes in characteristic IR absorption bands of Si- O bond (1065cm-1, str.), Ti- O bond (1058cm-1, str.; 625cm-1, bending) and C- O bond (1036cm-1, and 1033 cm-1 str.) in the Si- O- C and Ti- O-C groups, as well as of Si- Cl bond (609 cm-1 and 593cm-1, asym.str.), and Ti- Cl bond (499cm-1 and 478cm-1, asym str.), show that there are Ti- O- C groups in catalyst precursor (before mixing with AlR3) Details of designation of the above-mentioned bond have been given. The changes in IR spectra of the samples from consecutive steps of catalyst preparation can be explained by the following reactions,The active component TiCl4 might be bound to the MgCl2 support via an oxygen bridge, or Cl bridge. So, catalyst precursor may be denoted as更多还原