【作者】 孙彦彬；

【导师】 匡洞庭；

【作者基本信息】 大庆石油学院 ， 化学工程， 2003， 硕士

【摘要】 后过渡金属烯烃聚合催化剂是继茂金属催化剂之后发展起来的一种新型、高效的烯烃聚合催化剂，具胡合成简单、收率高、对空气和水的敏感性弱、催化烯烃聚合活性高等优点。后过渡金属镍、钯烯烃聚合催化剂在催化单一原料乙烯制线性低密度聚乙烯、催化乙烯和极性单体聚合方面具有突出的优势。国内外许多研究人员都对此产物浓厚的兴趣，都已经开展了这方面的研究工作。 本论文主要合成了两种后过渡金属烯烃聚合催化剂，并对影响催化剂性能的反应条件、催化剂结构等因素进行了系统的研究，研究结构表明：α-二胺型Ni、Pd催化剂1、2都是高效的乙烯聚合催化剂，Ni催化剂的活性可达7.84×10~7gPE/molNi·h(35℃，4.08MPa，Al/Ni=200)，钯催化剂的活性要比镍催化剂的活性低一些。催化剂空间的结构特别是苯胺邻位基团对催化体系的活性和所得产物的分子量有着重要的影响。取代基位阻越大，催化剂活性越低，聚合产物的分子量越大。聚合反应条件对该催化剂的活性和产物分子量有着重要的影响。随聚合反应温度的增加，催化剂的活性降低，产物分子量减低。助催化剂与催化剂的摩尔比对催化剂的活性和聚合产物的分子量有着重要的影响，随Al/Ni摩尔比的增加，催化剂的活性增加，但当Al/Ni摩尔比大于1000时，催化剂活性变化不大，随Al/Ni摩尔比的增加，产物分子量降低。随反应压力的增加，催化剂的活性增加，产物分子量也增加。更多还原

【Abstract】 Late-transition metal catalysts for olefin polymerization is developed after metallocene catalysts, it is a novel and high activity catalyst for olefin polymerization. It is easy to synthesize and have low oxophilic nature. The nickel and palladium catalysts have extrude advantage in catalyse singleness ethylene to manufacture LLDPE and catalyse copolymerization of ethylene and polar monomer. Many national scientists have interest in researching and developing the catalyst.Two kinds of Ni(II) , Pd(II)a-diimine late-transition metal complexes catalysts have been synthesized and examined for ethylene polymerization in combination with methylaluminoxane as co-catalysts. The effect of reaction conditions and the structure of catalysts were investigated systemly. The results show that: the Ni(II), Pd(II)a-diimine catalysts are all high activity catalyst for ethylene polymerization and the activity of Ni catalyst is up to 7.84xl07gPE/molNi.h(35℃ , 4.08MPa, Al/Ni=200), the activity of Pd is lower thant Ni. The structure of catalyst, especial the ortho-group of aniline has important effect on catalysts and molecular weight. The activity and molecular weight is decreasing with the reaction temperature increasing. The ratio of co-catalyst and catalyst has effect on activity and molecular weight. The activity is increasing and molecular weight is decreasing with the increasing of Al/Ni. But when Al/Ni is greater than 1000, the activity in change very slowly. The activity and molecular weight is increasing with the increasing of reaction pressure.更多还原