磷酸酯配体对镍系催化剂催化丁二烯聚合的影响  

Effect of phosphate ligand on butadiene polymerization catalyzed by nickel based catalyst

作　　者：丁岸 孙彦杰[1] 彭修娜[1] 华静[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《合成橡胶工业》2015年第1期20-24,共5页China Synthetic Rubber Industry

基　　金：山东省自然科学基金资助项目(ZR 2011 EL 008);青岛市科技计划基础研究项目(13-1-4-133-jch)

摘　　要：研究了在环烷酸镍-三异丁基铝（简称Al）-三氟化硼乙醚络合物（简称B）体系中添加磷酸二（2-乙基己基）酯（简称P）对丁二烯聚合活性的影响,并通过傅里叶变换红外光谱、凝胶渗透色谱、凝胶渗透色谱-激光光散射仪-黏度计在线联用系统等对聚合物结构进行了表征。结果表明,采用P-B预混的陈化方式,取P与B的摩尔比为0.020,在Al与B的摩尔比为0.7~2.0时单体转化率都达了90%以上。聚合物的相对分子质量可通过改变P/B或Al/B进行调节。P的引入对聚合产物的顺式结构含量几乎没有影响,产物仍为高顺式聚丁二烯;在高相对分子质量级分的支化度较高,所得聚合物溶液的剪切黏度下降。The effect of introduce of bis-（ 2-ethylhexyl） phosphate（ simplied as P） ligand in Ni（ naph）2-Al（ i-Bu）3（ simplied as Al）-BF3·OEt2（ simplied as B） catalyst system on polymerization activity of butadiene was studied,and the structure of obtained polymer was characterized by Fourier transform-infrared spectroscopy, gel permeation chromatography（ GPC）,and GPC-laser light scattering spectrometer-viscometer on-line analytic system.The results showed that when P-B premixing aging mode was used and P / B（ mole ratio） was 0. 020,the monomer conversion all reached over 90% in the Al / B（ mole ratio） range of 0. 7- 2. 0. The relative molecular mass of the polymer could be regulated by changing P / B and Al / B. The obtained product was high cis-1,4-polybutadiene,and the introduce of P had little effect on the content of cis-1,4-unit. The branching degree increased in high relative molecular mass part,and shear viscosity of the polymer solution decreased

关 键 词：顺式聚丁二烯 磷酸酯类配体 镍系催化剂 配位聚合 微观结构 

分 类 号：TQ316.33[化学工程—高聚物工业]