A REINVESTIGATION OF BETA-TICL3 .2. CATALYTIC ACTIVITY IN PROPENE POLYMERIZATION

被引：8

作者：

BUSICO, V ^{[1
]}

CORRADINI, P ^{[1
]}

DEMARTINO, L ^{[1
]}

TRIFUOGGI, M ^{[1
]}

机构：

[1] NAPLES UNIV,DIPARTIMENTO CHIM,VIA MEZZOCANNONE 4,I-80134 NAPLES,ITALY

来源：

EUROPEAN POLYMER JOURNAL | 1992年 / 28卷 / 05期

关键词：

D O I：

10.1016/0014-3057(92)90127-N

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The catalytic behaviour in propene polymerization of "preformed" samples of beta(brown) TiCl3 was reinvestigated and compared with that of in situ TiCl4/AlR3 mixtures. Catalyst systems based on beta-TiCl3 produced highly regioregular polypropene samples with microstructures close to those of polymers obtained in the presence of violet TiCl3 [apart from a lower fraction of "highly isotactic" macromolecules (insoluble in boiling heptane)]. On the other hand, catalyst systems originating from the interaction of TiCl4 and an Al-trialkyl in the polymerization medium were found to contain, in addition to a heterogeneous beta-TiCl3 phase, homogeneous Ti species contributing substantially to the polymerization activity and responsible for the formation of a polymer fraction which is rather stereo- and regio-irregular and has low molecular weight.

引用

页码：519 / 523

页数：5

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