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%。
出处
《合成橡胶工业》
CAS
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。
