连续聚合工艺制备窄分子量分布稀土顺丁橡胶  

Preparation of rare-earth cis-polybutadiene rubber with narrow molecular weight distribution by continuous polymerization

作　　者：韩明哲[1] HAN Ming-zhe(College of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学高分子科学与工程学院

出　　处：《合成橡胶工业》2019年第5期348-351,共4页China Synthetic Rubber Industry

摘　　要：以磷酸酯钕为主催化剂,采用间歇陈化法制备均相稀土催化剂,并在2 kg/h连续聚合装置上,制备出门尼黏度为45±4、分子量分布(Mw/Mn)为2.14~2.84的稀土顺丁橡胶(Nd-BR)。结果表明,通过调整催化剂配方,可以调整Nd-BR的Mw/Mn和微观结构,以得到不同结构的Nd-BR产品。采用磷酸酯钕为主催化剂的均相催化剂合成Nd-BR,胶液黏度较低,各反应釜压差相对较小,易于胶液输送。Homogeneous rare-earth catalysts were prepared by batch aging with neodymium phosphate as the main catalyst.Rare-earth cis-polybutadiene(Nd-BR)with Mooney viscosity of 45±4 and relative molecular weight distribution(Mw/[AKM-]n)of 2.14~2.84 were prepared by 2 kg/h continuous polymerization plant.The results showed that the Mw/Mn and microstructure of Nd-BR could be adjusted by adjusting the catalyst formula to obtain Nd-BR products with different structures and performances.The homogeneous catalyst of neodymium phosphate was used to synthesize Nd-BR,the viscosity of the glue was low,the pressure difference of each reactor was relatively small,and it was easy to be transported.

关 键 词：稀土催化剂 连续聚合 顺丁橡胶 分子量分布 门尼黏度 

分 类 号：TQ333.2[化学工程—橡胶工业]