氢气和外给电子体对负载型Ziegler-Natta催化丁烯-1聚合的影响  

EFFECTS OF HYDROGEN AND EXTERNAL DONOR ON PERFORMANCE OF BUTENE-1 POLYMERIZATION CATALYZED BY SUPPORTED Ziegler-Natta CATALYST

作　　者：陈克文[1] 徐可忠[2] 任合刚[1] 王亚丽 杨敏[1] 闫卫东[1] 刘宾元[1] 

机构地区：[1]河北工业大学化工学院高分子科学与工程研究所,天津300130 [2]中国石油天然气股份有限公司,北京100007 [3]中国石油大庆化工研究中心,黑龙江大庆163714

出　　处：《精细石油化工》2010年第5期9-13,共5页Speciality Petrochemicals

基　　金：高等学校博士学科点专项科研基金(200800800002);河北省科技支撑计划(09215110D)

摘　　要：研究了氢气和烷氧基硅烷类外给电子体对负载型Ziegler—Natta丁烯-1专用催化剂聚合性能的影响，并采用GPC、DSC和偏光显微镜，对聚合物进行了分析。结果表明：聚合活性随氢气加入量的增加先上升后下降；不同外给电子体时，以加入DCPMS时催化剂活性和产物等规度最高；降低氢气加入量和增大外给电子体烷基空间体积均可使聚丁烯-1相对分子质量增大。聚合物的相对分子质量对聚丁烯-1的结晶影响明显，在Mw-23．5×10^4g／mol时的聚丁烯-1的熔点较高、结晶度也高。The effects of hydrogen and alkoxysilanes as external donors on the polymerization of butene-1 with supported Ziegler-Natta catalysts were studied, and the polymers were characterized by GPC, DSC and the polarized light microscope analysis. The results showed that the polymerization activity first increased and then decreased with the increase of the amounts of hydrogen. The highest catalytic activity and the best product isotacticity could be obtained when DCPMS was used as the external donor. Molecular mass of polybutene-1 increased with reducing the dose of hydrogen and increasing external electron donor alkyl-space volumes. The molecular weight apparently affected the crystallization of the polymers, with Mw = 23. 5 × 10^4 g/mol, the polybutene-1 showed the highest melting point and crystallinity.

关 键 词：聚丁烯-1 外给电子体 氢气 相对分子质量 

分 类 号：TQ325.15[化学工程—合成树脂塑料工业]