Supported Ziegler-Natta catalysts from MgCl_(2)·nROH precursors and its catalytic behaviors for diene copolymerization  

基于MgCl_(2)·nROH前驱体的负载型Ziegler-Natta催化剂及其催化二烯烃共聚合行为

作　　者：FAN Xun-zhang ZHAO Yuan-jin LUO Shu-fang HE Ai-hua 范勋章;赵远进;罗淑芳;贺爱华(青岛科技大学高分子科学与工程学院/山东省烯烃催化与聚合重点实验室/橡塑材料与工程教育部重点实验室,山东青岛266042)

机构地区：[1]Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization/Key Laboratory of Rubber-Plastics of Ministry of Education/School of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China

出　　处：《合成橡胶工业》2024年第4期348-348,共1页China Synthetic Rubber Industry

基　　金：Supported by National Key Research and Development Program of China(2022 YFB 3704700(2022 YFB 3704702));Major Scientific and Technological Innovation Project of Shandong Province(2021 CXGC 010901);Taishan Scholar Program。

摘　　要：Heterogeneous TiCl4/MgCl_(2) type Ziegler-Natta(Z-N)catalysts with unique advantages like low cost,high activity,high stereoregularity and pretty particle morphology,contribute to more than 130 Mt polyolefin large-scale production.However,most researches related with heterogeneous Z-N catalysts focused onα-olefin polymerizations like ethylene,propylene,etc.采用化学活化法制备了负载型Ziegler-Natta催化剂的前驱体MgCl_(2)·nROH,并负载TiCl_(4)制备了不同的预催化剂TiCl4/MgCl_(2)(C-Cat),同时采用物理研磨法制备预催化剂TiCl4/MgCl_(2)(P-Cat)与C-Cat进行对比,进一步研究了不同预催化剂催化丁二烯-异戊二烯的共聚合行为。研究发现,用正丙醇制备的前驱体颗粒表面较粗糙,比表面积较大(51.5 m^(2)/g),催化丁二烯与异戊二烯共聚合呈现高的催化效率(6238 g/g),较P-Cat催化效率提高32.8%。由不同活化法制备的Ziegler-Natta预催化剂均呈现高反式-1,4-结构定向聚合特征,异戊二烯链段的反式-1,4-结构摩尔分数大于94%。

关 键 词：CATALYSTS REGULARITY PROPYLENE 

分 类 号：TQ426[化学工程] TQ325.1