STEREOCHEMICAL CONTROL IN PROPYLENE POLYMERIZATION WITH A ASYMMETRICALLY SUBSTITUTED TITANOCENE/METHYLALUMINOXANE CATALYST


Autoria(s): TIAN J; HU NH; SHEN Q; HUANG BT
Data(s)

1995

Resumo

A new mono-substituted titanocene, (eta(5)-cyclopentadienyl) [eta(5)-(1-(4-methoxyphenyl) cyclohexyl) cyclopentadienyl] dichlorotitanium (I), has been prepared via a novel modified synthesis, and its X-ray crystal structure has been determined. It crystallizes in the orthorhombic space group P2(1)2(1)2(1) with cell constants a=0.968 0(5) nm, b=1.284 6(5) nm, c=1.694 4(6) nm, Z=4, R=0.066. The I/methylaluminoxane (MAO) catalyst system produces at different polymerization temperatures either an isotactic or a syndiotactic polypropylene, both of which have the combined influence of enantiomorphic-site control and chain-end control, or an atactic polypropylene controlled by Bernoullian propagation mechanism.

Identificador

http://ir.ciac.jl.cn/handle/322003/26437

http://www.irgrid.ac.cn/handle/1471x/159297

Idioma(s)

英语

Fonte

TIAN J;HU NH;SHEN Q;HUANG BT.STEREOCHEMICAL CONTROL IN PROPYLENE POLYMERIZATION WITH A ASYMMETRICALLY SUBSTITUTED TITANOCENE/METHYLALUMINOXANE CATALYST,SCIENCE IN CHINA SERIES B-CHEMISTRY LIFE SCIENCES & EARTH SCIENCES,1995,38(9):1068-1074

Palavras-Chave #METHYLALUMOXANE #POLYPROPYLENE #MECHANISM #COMPLEXES #PROPENE
Tipo

期刊论文