Amorphous polyethylene by tandem action of cobalt and titanium single-site catalysts

被引：43

作者：

Bianchini, C

Frediani, M

Giambastiani, G

Kaminsky, W

Meli, A

Passaglia, E

机构：

[1] CNR Firenze, Area Ric, ICCOM CNR, I-50019 Sesto Fiorentino, Italy

[2] Univ Florence, Dipartmento Chim Organ, I-50019 Sesto Fiorentino, Italy

[3] Univ Hamburg, Inst Tech & Macromol Chem, D-20146 Hamburg, Germany

[4] ICCOM CNR, Dipartimento Chim & Chim Ind, Sez Pisa, I-56121 Pisa, Italy

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2005年 / 26卷 / 15期

关键词：

catalysts; cobalt; polyethylene (PE); tandem catalysis; titanium;

D O I：

10.1002/marc.200500243

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 variety of branched polyethylenes, spanning from semicrystalline LLDPE to completely amorphous, rubbery PE, was obtained from ethylene by homogeneous tandem catalysis using combinations of CocCl(2)(N-2(BT)) (1) (N-2(BT) = [1 -(6-benzo[b]thiophen-2-yl-pyridin-2-yl)-ethylidlene)-(2,6-diisopropyl-phenyl)-amine) and [(eta(5)-C5Me4)SiMe2(tBuN)]TiCl2 (2) in the presence of MAO at 30 degrees C. The productivity reached a maximum of 4 570 kg PE (mol Ti center dot h)(-1) at chi(Co) = 0.50, yielding a rubbery material with d(25) = 0.868 g center dot cm(-3) and T-g = -55 degrees C.

引用

收藏

页码：1218 / 1223

页数：6

相关论文

共 34 条

[1] Polynuclear catalysis: Enhancement of enchainment cooperativity between different single-site olefin polymerization catalysts by ion pairing with a binuclear cocatalyst [J].

Abramo, GP ;

Li, LT ;

Marks, TJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (47) :13966-13967

[2] Synthesis of branched polyolefins using a combination of homogeneous metallocene mimics [J].

Barnhart, RW ;

Bazan, GC ;

Mourey, T .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1998, 120 (05) :1082-1083

[3]

Bianchini C, 2004, NATO SCI SER II-MATH, V175, P15

[4] Role of single-site catalysts in the hydrogenation of thiophenes: from models systems to effective HDS catalysts [J].

Bianchini, C ;

Meli, A ;

Vizza, F .

JOURNAL OF ORGANOMETALLIC CHEMISTRY, 2004, 689 (24) :4277-4290

[5] Selective oligomerization of ethylene to linear α-olefins by tetrahedral cobalt(II) complexes with 6-(organyl)-2-(imino)pyridyl ligands:: Influence of the heteroatom in the organyl group on the catalytic activity [J].

Bianchini, C ;

Mantovani, G ;

Meli, A ;

Migliacci, F ;

Laschi, F .

ORGANOMETALLICS, 2003, 22 (13) :2545-2547

[6] A fully integrated high-throughput screening methodology for the discovery of new polyolefin catalysts: Discovery of a new class of high temperature single-site group (IV) copolymerization catalysts [J].

Boussie, TR ;

Diamond, GM ;

Goh, C ;

Hall, KA ;

LaPointe, AM ;

Leclerc, M ;

Lund, C ;

Murphy, V ;

Shoemaker, JAW ;

Tracht, U ;

Turner, H ;

Zhang, J ;

Uno, T ;

Rosen, RK ;

Stevens, JC .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (14) :4306-4317

[7] ETHYLENE HEXENE COPOLYMERIZATION BY HETEROGENEOUS AND HOMOGENEOUS ZIEGLER-NATTA CATALYSTS AND THE COMONOMER EFFECT [J].

CHIEN, JCW ;

NOZAKI, T .

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1993, 31 (01) :227-237

[8] Linear low density polyethylene (LLDPE) from ethylene using TpMsNiCl (TpMs = hydridotris(3-mesitylpyrazol-1-yl)) and CP2ZrCl2 as a tandem catalyst system [J].

Furlan, LG ;

Kunrath, FA ;

Mauler, RS ;

de Souza, RF ;

Casagrande, OL .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2004, 214 (02) :207-211

[9] NMR study of branched polyethylenes obtained with combined Fe and Zr catalysts [J].

Galland, GB ;

Quijada, R ;

Rojas, R ;

Bazan, G ;

Komon, ZJA .

MACROMOLECULES, 2002, 35 (02) :339-345

[10]

Galland GB, 1999, POLYM INT, V48, P660, DOI 10.1002/(SICI)1097-0126(199908)48:8<660::AID-PI212>3.0.CO

← 1 2 3 4 →