A comparative study of ethylene/α-olefin copolymerization with silane-modified silica-supported MAO using zirconocene catalysts

被引：19
作者：
Jongsomjit, B [1 ]
Kaewkrajang, P
Wanke, SE
Praserthdam, P
机构：
[1] Chulalongkorn Univ, Fac Engn, Dept Chem Engn, Ctr Excellence Catalysis & Catalyt React Engn, Bangkok 10330, Thailand
[2] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2R3, Canada
来源：
CATALYSIS LETTERS | 2004年 / 94卷 / 3-4期
关键词：
copolymerization; metallocene catalyst; polyethylene; silica; support;
D O I：
10.1023/B:CATL.0000020547.69383.e6
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Activities of ethylene/alpha-olefin copolymerization were found to increase with silane-modified silica-supported MAO using ansa-zirconocene catalyst. The increase in activities was less pronounced when higher alpha-olefins were used. However, silane modi. cation resulted in the narrower molecular weight distribution of polymers. C-13 NMR revealed that ethylene incorporation in all systems gave polymers with the similar triad distribution.
引用
收藏
页码：205 / 208
页数：4
相关论文
共 25 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]   Copolymerization of ethylene and 1-hexene with Et(Ind)2ZrCl2 in hexane [J].
Britto, ML ;
Galland, GB ;
dos Santos, JHZ ;
Forte, MC .
POLYMER, 2001, 42 (15) :6355-6361
[3]  
Chao CR, 2002, MACROMOL RAPID COMM, V23, P672, DOI 10.1002/1521-3927(20020801)23:12<672::AID-MARC672>3.0.CO
[4]  
2-I
[5]   OLEFIN COPOLYMERIZATION WITH METALLOCENE CATALYSTS .1. COMPARISON OF CATALYSTS [J].
CHIEN, JCW ;
HE, DW .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1991, 29 (11) :1585-1593
[6]  
Chu KJ, 1999, MACROMOL CHEM PHYSIC, V200, P2372, DOI 10.1002/(SICI)1521-3935(19991001)200:10<2372::AID-MACP2372>3.3.CO
[7]  
2-W
[8]   13C NMR determination of the composition of linear low-density polyethylene obtained with [η3-methallyl-nickel-diimine]PF6 complex [J].
Galland, GB ;
de Souza, RF ;
Mauler, RS ;
Nunes, FF .
MACROMOLECULES, 1999, 32 (05) :1620-1625
[9]   Effects of Al/Zr ratio on ethylene-propylene copolymerization with supported-zirconocene catalysts [J].
Haag, MC ;
Krug, C ;
Dupont, J ;
de Galland, GB ;
dos Santos, JHZ ;
Uozumi, T ;
Sano, T ;
Soga, K .
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2001, 169 (1-2) :275-287
[10]   Propene polymerization catalyzed over MCM-41 and VPI-5-supported Et(ind)(2)ZrCl2 catalysts [J].
Ko, YS ;
Han, TK ;
Park, JW ;
Woo, SI .
MACROMOLECULAR RAPID COMMUNICATIONS, 1996, 17 (11) :749-758
123