【摘要】 以氯化镁六水合物（ＭｇＣｌ＿２·６Ｈ＿２Ｏ）作为三甲基铝的新水解剂制备甲基铝氧烷。对三甲基铝的水解速度、水解反应产物甲基铝氧烷和ＭｇＣｌ＿２固体余留物的组成和结构进行了探讨。在相同条件下，与用Ａｌ＿２（ＳＯ＿４）＿３·１８Ｈ＿２Ｏ和ＮｄＣｌ＿３·７Ｈ＿２Ｏ水解剂制备甲基铝氧烷进行对比试验，表明由这３种水解剂制得的甲基铝氧烷的结构性能不同。其中，以ＭｇＣｌ＿２·６Ｈ＿２Ｏ水解剂制备的甲基铝氧烷产率（按水解反应放出的ＣＨ＿４气计算）、甲基铝氧烷的分子量（或齐聚度）、以及用作Ｃｐ＿２ＺｒＣｌ＿２的助催化剂对乙烯聚合的活性都高于其他两种水解剂。更多还原

【Abstract】 Methylaluminoxane was prepared by using a new hydrated salt, MgCl₂·6H₂O as thehydrolyzing agent for trimethyl aluminium. The hydrolyzing rate of TMA was determined.The characterization of MAO and the solid residue was made by chemical and elementanalysis,IR and UV. In comparison with the other hydrolyzing agents, Al₂（SO₄）₃· 18H₂O andNdCl₃·7H₂O,the calculated yield（based on the amount of methane evolution）,molecularweight（or oligomerization degree）of MAO from MgCl₂·6H₂O and its catalytic activity ascocatalyst of Cp₂ZrCl₂ for ethylene polymerization are higher under the same preparationand polymerization conditions.更多还原