Fluorinated half-sandwich complexes as catalysts in syndiospecific styrene polymerization

被引：155
作者：
Kaminsky, W
Lenk, S
Scholz, V
Roesky, HW
Herzog, A
机构：
[1] Univ Hamburg, Inst Tech & Makromol Chem, D-20146 Hamburg, Germany
[2] Univ Gottingen, Inst Anorgan Chem, D-37077 Gottingen, Germany
来源：
MACROMOLECULES | 1997年 / 30卷 / 25期
关键词：
D O I：
10.1021/ma970601j
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Fluorinated half-sandwich complexes of titanium, such as CpTiF3, show an increase in activity of up to a factor of 50 compared to chlorinated compounds. In a temperature range of 10-70 degrees C the excess of methylaluminoxane (MAO) can be reduced to an Al:Ti ratio of 300. The highest melting point of 277 degrees C can be obtained using pentamethylcyclopentadienyltitanium trifluoride (CpTiF3)-Ti-*. This fluorinated complex affords polymers with a significantly higher molecular weight than with the chlorinated compound. Alkyl substitution of the cyclopentadienyl ligand can increase the activity.
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收藏
页码：7647 / 7650
页数：4
相关论文
共 22 条
[1]  
CAMPELL RE, 1988, Patent No. 4774301
[2]   Highly stable catalysts for the stereospecific polymerization of styrene [J].
Foster, P ;
Chien, JCW ;
Rausch, MD .
ORGANOMETALLICS, 1996, 15 (09) :2404-2409
[3]   Reductive decomposition of cationic half-titanocene(IV) complexes, precursors of the active species in syndiospecific styrene polymerization [J].
Grassi, A ;
Zambelli, A ;
Laschi, F .
ORGANOMETALLICS, 1996, 15 (02) :480-482
[4]   TRIMETHYLTIN FLUORIDE - A NEW FLUORINATING REAGENT FOR THE PREPARATION OF ORGANOMETALLIC FLUORIDES [J].
HERZOG, A ;
LIU, FQ ;
ROESKY, HW ;
DEMSAR, A ;
KELLER, K ;
NOLTEMEYER, M ;
PAUER, F .
ORGANOMETALLICS, 1994, 13 (04) :1251-1256
[5]   STEREOSPECIFIC POLYMERIZATION OF STYRENE GIVING THE SYNDIOTACTIC POLYMER [J].
ISHIHARA, N ;
KURAMOTO, M ;
UOI, M .
MACROMOLECULES, 1988, 21 (12) :3356-3360
[6]   CRYSTALLINE SYNDIOTACTIC POLYSTYRENE [J].
ISHIHARA, N ;
SEIMIYA, T ;
KURAMOTO, M ;
UOI, M .
MACROMOLECULES, 1986, 19 (09) :2464-2465
[7]   SYNDIOSPECIFIC POLYMERIZATION OF STYRENE WITH ARENE TITANIUM(II) COMPLEXES AS CATALYST PRECURSORS [J].
KAMINSKY, W ;
PARK, YW .
MACROMOLECULAR RAPID COMMUNICATIONS, 1995, 16 (05) :343-346
[8]   SYNDIOSPECIFIC POLYMERIZATION OF STYRENE BY SOLUBLE ALKOXYTITANIUM CATALYSTS [J].
KAMINSKY, W ;
LENK, S .
MACROMOLECULAR CHEMISTRY AND PHYSICS, 1994, 195 (06) :2093-2105
[9]   New polymers by metallocene catalysis [J].
Kaminsky, W .
MACROMOLECULAR CHEMISTRY AND PHYSICS, 1996, 197 (12) :3907-3945
[10]  
KISSIN YV, 1994, Patent No. 5326837
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