Organic Nanoparticles as Fragmentable Support for Ziegler-Natta Catalysts

被引：13

作者：

Nietzel, Sven ^{[1
]}

Joe, Daejune ^{[1
]}

Krumpfer, Joseph W. ^{[1
]}

Schellenberger, Frank ^{[1
]}

Alsaygh, Abdulhamid A. ^{[2
]}

Fink, Gerhard ^{[3
]}

Klapper, Markus ^{[1
]}

Muellen, Klaus ^{[1
]}

机构：

[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

[2] King Abdulaziz City Sci & Technol, Riyadh 11442, Saudi Arabia

[3] Max Planck Inst Coal Res, D-45470 Mulheim, Germany

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2015年 / 53卷 / 01期

关键词：

fragmentation; heterogeneous ethylene polymerization; molecular weight distribution; supports; Ziegler-Natta polymerization; MOLECULAR-WEIGHT DISTRIBUTION; ALKYL-AL COCATALYSTS; METALLOCENE CATALYSTS; OLEFIN POLYMERIZATION; DISTRIBUTION MWD; ACTIVE-SITES; ETHYLENE; POLYETHYLENE; POLYOLEFINS; POLYPROPYLENE;

D O I：

10.1002/pola.27442

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A fragmentable support material for Ziegler-Natta catalysts is presented based on micrometer-sized aggregates of polystyrene nanoparticles. Hydroxyl anchoring groups are introduced by copolymerization of hydroxymethylstyrene in emulsion process to immobilize the catalysts. The catalytic activity in ethylene slurry polymerizations is found to be directly correlated to the hydroxyl group content of the supports. Furthermore, the fragmentation behavior of dye-labeled support aggregates into the initial nanoparticles is demonstrated using laser scanning confocal fluorescence microscopy as a nondestructive method. These supported catalysts fulfill two important design criteria, high fragmentability and high catalyst loading, and produce high-density polyethylene with medium molecular weight distributions (MWDs=3-4). These values lie between those obtained using single-site metallocene-based (narrow MWD<3) or inorganic supported multi-site Ziegler-Natta-based (broad MWD=4-12) polymerizations without the need of blending. (c) 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 15-22

引用

页码：15 / 22

页数：8

共 46 条

[1] Synthesis of a TiCl4 Ziegler-Natta Catalyst Supported on Spherical MgCl2 • nEtOH for the Polymerization of Ethylene and Propylene [J].