稀土催化剂中混合烷基铝对丁二烯聚合的影响

THE EFFECT OF MIXTURE OF Nd(naph)_3+Al(i-Bu)_2Cl+[Al(i-Bu)_2H+Al(i-Bu)_3 ] ON BUTADIENE POLYMERIZATION

研究了Al(i-Bu) 2 H和Al(i-Bu) 3分别与Nd(naph) 3、Al(i-Bu) 2 Cl组成稀土催化剂 ,按不同配比组成混合烷基铝稀土催化体系引发丁二烯聚合的反应 ,结果表明混合铝中Al(i-Bu) 2 H、Al(i-Bu) 3的配比对催化体系的聚合活性及产物 [η]值有重要影响。实验在 5L三釜连续模式装置上进行了放大 ,制备的稀土顺丁橡胶与意大利Enichem公司生产的同门尼胶样结构及性能相当。

With the differences of the kinetics of butadiene polymerization with two rare earth catalyst systems consisted of Nd(naph) 3 and Al(i-Bu) 3 or Al(i-Bu) 2H, the effect of mixture of Al(i-Bu) 2H and Al(i-Bu) 3 on butadiene polymerization is studied. It has been found that the molar ratio of Al(i-Bu) 2H and Al(i-Bu) 3 had a considerable effect on the catalytic activity .The results showed that the prepared rubber and its oil-extended rubber has excellent mechanical properties.