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EPR法研究了Ti(OBu),Ti(OBu)_3Cl,Ti(OBu)_2Cl_2,Ti(OBu)Cl_3和MgCl_2-n-BuOH-Ti(OBu)_4,MgCl_2-n-BuOH-Ti(OBu)_4-TiCl_4,MgCl_2-n-BaOH-SiCl_4-TiCl_4分别与Al(i-Bu)_3相互作用的结果表明,载体及配位体的特性都会影响到中心Ti~(3+)离子的EPR特征。通过干燥氯化氢处理和添加电子给予体改善了催化剂晶体结构规整性,表观上呈现对称性较好的EPR谱,在丙烯聚合时相应地表现出较高的定向性。
EPR method was used to study the effect of Ti (OBu), Ti (OBu) _3Cl, Ti (OBu) _2Cl_2, Ti (OBu) Cl_3 and MgCl_2-n-BuOH- The results of interaction between TiCl 4, MgCl 2 -n-BaOH-SiCl 4 -TiCl 4 and Al (i-Bu) 3 respectively indicate that the characteristics of the support and the ligand all affect the EPR characteristics of the central Ti 3+ ions. The crystal structure regularity of the catalyst is improved by the treatment of the dry hydrogen chloride and the addition of the electron donor, and the symmetrical EPR spectrum is apparently presented. Correspondingly, the propylene polymer exhibits relatively high orientation.