调节镍顺丁胶分子量的新方法

The New Method of Regulating the Molecular Weight of CiS-1,4-Polybutadiene

考察了Ni(naph)_2—Al(i—Bu)_3—(BF_3·OEt_2—C_8H_(17)OH)体系催化丁二烯聚合的规律。实验结果表明,该体系催化活性较高、稳定性好、适宜的Al/B比范围宽、所得聚合物为高CiS—1,4—聚丁二烯。Al/B 比由0.3增至3.0时,聚合物的特性数[η]由0.6升至5.2dl/g。改变 Al/B 比,可有效地调节聚合物的分子量。

The polymerization regularity of butadiene with Ni(naph)_2—Al(i—Bu)_3—BF_3—OEt_2+C_2H_(17)OH catalyst system has many advantages,i.e.,a high catalytic activity,a great catalytic stability and a wide ran-ge of the optimum mole ratio of A1/B.The product consists mainly ofcis—1,4-polybutadiene.The intrinsic viscosity of polymer,[η],wasincreasing from 0.6 dl/g to 5.2 dl/g with the rising of A1/B ratio from0.3 to 3.0.The molecular weight of the polymer could be notably regula-ted by changing AI/B ratio.