摘要
用球磨法制备的SiO_2负载TiCl_4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；SiO_2在负载TiCl_4前用适量Al(i－Bu)_3处理，或将球磨法制备的TiCl_4/SiO_2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。
The polymerization of butadiene with TiCl_4/SiO_2 supported catalyst was studied. The TiCl_4/SiO_2 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; TiCl_4/SiO_2 reacting with Al(i－Bu)2Cl at 100 ℃for 1 h or SiO_2 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％.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
2001年第4期211-214,共4页
China Synthetic Rubber Industry
