【摘要】 用球磨法制备的SiO₂负载TiCl₄催化剂进行丁二烯溶液聚合，考察了催化剂制备条件对催化效率的影响，分析了聚合物的结构。结果表明：球磨48 h，负载钛质量分数4％的催化剂具有较好的催化效率；SiO₂在负载TiCl₄前用适量Al（i－Bu）₃处理，或将球磨法制备的TiCl₄/SiO₂催化剂与适量Al（i－Bu）₂Cl 在100 ℃下反应1 h，均能大幅度提高催化剂的活性；在40～50 ℃下，聚合按溶液淤浆聚合形式进行，产物为低顺式聚丁二烯。更多还原

【Abstract】 The polymerization of butadiene with TiCl₄/SiO₂ supported catalyst was studied. The TiCl₄/SiO₂ catalysts were made by the ball－milling method. The experimental results showed that the preparing conditions of catalyst had obvious effect on the catalytic efficiency. The proper conditions were grinding for 48 h with 4％mass fraction of titanium; TiCl₄/SiO₂ reacting with Al（i－Bu）2Cl at 100 ℃for 1 h or SiO₂ pre－treating with Al（i－Bu）3 before grinding could increase catalytic efficiency markedly. Polymerization of butadiene was a kind of solution slurry polymerization in 40～50 ℃. The content of cis－1,4－unit of the polybutadiene was about 56％.更多还原