POSS-modified supported Ziegler-Natta catalyst and its ethylene /1-hexene copolymerization

被引：0

作者：

Wang N. ^{[1
]}

Hui L. ^{[1
]}

Chen M. ^{[1
,3
]}

Li W. ^{[1
]}

Zhou Q. ^{[2
]}

机构：

[1] School of Materials Science and Chemical Engineering, Ningbo University, Ningbo

[2] College of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo

[3] College of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou

来源：

Huagong Xuebao/CIESC Journal | 2021年 / 72卷 / 04期

关键词：

1-hexene; Copolymerization; Ethylene; Macro-SiO[!sub]2[!/sub; POSS; Ziegler-Natta catalyst;

D O I：

10.11949/0438-1157.20201036

中图分类号：

学科分类号：

摘要：

Macroporous SiO2 (Macro-SiO2) with an open framework structure and MgCl2 are used to form a composite carrier, and polysilsesquioxane (POSS) is introduced to form a spatially separated POSS/ MgCl2 nano-aggregate, which is prepared after loading TiCl4 modified Ziegler-Natta catalyst. The catalytic structure of POSS-free and modified catalysts was investigated by FTIR, TG, CO low-temperature IR spectroscopy, SEM and particle size analysis. The incorporated POSS contributed the formation of defect Mg4c2+ sites and Lewis acidic sites, where the more defect Mg sites facilitated the effective loading of TiCl4. The POSS-modified Ziegler-Natta catalyst exhibited exceptional activity reaching 1.03×106 g∙(mol•h)-1 in ethylene/1-hexene copolymerization. Simultaneously, the ethylene-hexene copolymer with much higher comonomer contents (3.79%) and narrowed molecular weight distribution (MWD=3-6) was synthesized in the POSS modified catalyst. © 2021, Editorial Board of CIESC Journal. All right reserved.

引用

页码：2102 / 2112

页数：10

共 32 条

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