Catalytic activity during copolymerization of ethylene and 1-hexene via mixed TiO2/SiO2-supported MAO with rac-Et[Ind]2ZrCl2 metallocene catalyst

被引：17

作者：

Jongsomjit, B ^{[1
]}

Ngamposri, S ^{[1
]}

Praserthdam, P ^{[1
]}

机构：

[1] Chulalongkorn Univ, Fac Engn, Dept Chem Engn, Ctr Excellence Catalysis & Catalyt React Engn, Bangkok 10330, Thailand

来源：

MOLECULES | 2005年 / 10卷 / 06期

关键词：

metallocene catalyst; titania; silica; supports; copolymerization;

D O I：

10.3390/10060672

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Activities during ethylene/1-hexene copolymerization were found to increase using the mixed titania/silica-supported MAO with rac-Et[Ind](2)ZrCl2 metallocene catalyst. Energy Dispersive X-ray spectorcopy (EDX) indicated that the titania was apparently located on the outer surface of silica and acted as a spacer to anchor MAO to the silica surface. IR spectra revealed the Si-O-Ti stretching at 980 cm(-1) with low content of titania. The presence of anchored titania resulted in less steric hindrance and less interaction due to supporting effect.

引用

页码：672 / 678

页数：7

共 20 条

[1] Silica-supported metallocene for ethylene polymerization [J].

Belelli, PG ;

Ferreira, ML ;

Damiani, DE .

APPLIED CATALYSIS A-GENERAL, 2002, 228 (1-2) :189-202

[2]

Chao CR, 2002, MACROMOL RAPID COMM, V23, P672, DOI 10.1002/1521-3927(20020801)23:12<672::AID-MARC672>3.0.CO

[3]

2-I

[4]

Chu KJ, 1999, MACROMOL CHEM PHYSIC, V200, P2372, DOI 10.1002/(SICI)1521-3935(19991001)200:10<2372::AID-MACP2372>3.3.CO

[5]

2-W

[6] CHROMIA SILICA TITANIA COGEL CATALYSTS FOR ETHENE POLYMERIZATION - POLYMERIZATION KINETICS [J].

CONWAY, SJ ;

FALCONER, JW ;

ROCHESTER, CH .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1989, 85 :71-78

[7] TITANIA-SILICA MIXED OXIDES .1. INFLUENCE OF SOL-GEL AND DRYING CONDITIONS ON STRUCTURAL-PROPERTIES [J].

DUTOIT, DCM ;

SCHNEIDER, M ;

BAIKER, A .

JOURNAL OF CATALYSIS, 1995, 153 (01) :165-176

[8] Titania-silica as catalysts: molecular structural characteristics and physico-chemical properties [J].

Gao, XT ;

Wachs, IE .

CATALYSIS TODAY, 1999, 51 (02) :233-254

[9] A comparative study on supporting effect during copolymerization of ethylene/1-olefins with silica-supported zirconocene/MAO catalyst [J].

Jongsomjit, B ;

Praserthdam, P ;

Kaewkrajang, P .

MATERIALS CHEMISTRY AND PHYSICS, 2004, 86 (2-3) :243-246

[10] A comparative study of ethylene/α-olefin copolymerization with silane-modified silica-supported MAO using zirconocene catalysts [J].

Jongsomjit, B ;

Kaewkrajang, P ;

Wanke, SE ;

Praserthdam, P .

CATALYSIS LETTERS, 2004, 94 (3-4) :205-208

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