Copolymerization of Propylene with 1-Octene Initiated by Highly Efficient Isospecific Metallocene Catalytic Systems

被引：14

作者：

Nedorezova, P. M. ^{[1
]}

Chapurina, A. V. ^{[1
]}

Koval'chuk, A. A. ^{[1
]}

Klyamkina, A. N. ^{[1
]}

Aladyshev, A. M. ^{[1
]}

Optov, V. A. ^{[1
]}

Shklyaruk, B. F. ^{[2
]}

机构：

[1] Russian Acad Sci, NN Semenov Chem Phys Inst, Moscow 119991, Russia

[2] Russian Acad Sci, AV Topchiev Petrochem Synth Inst, Moscow 119991, Russia

来源：

POLYMER SCIENCE SERIES B | 2010年 / 52卷 / 1-2期

基金：

俄罗斯基础研究基金会;

关键词：

OLEFIN POLYMERIZATION; ALPHA-OLEFINS; PROPENE; 1-HEXENE; MICROSTRUCTURES;

D O I：

10.1134/S1560090410010033

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 copolymerization of propylene with 1-octene in liquid propylene is carried out in the presence of a highly active homogeneous ansa-metallocene catalyst with the C(2)-symmetry rac-Me(2)Si(4-Ph-2-MeInd)(2)ZrCl(2) activated by methyl aluminoxane and in the presence of ansa-metallocene C(4)H(6)Si(2-Et-4-PhInd)(2)ZrCl(2) (rac : meso = 2 : 1) supported on silica gel treated with methylaluminoxane. In the case of the heterogenized metallocene, (iso-C(4)H(9))(3)Al is used as a cocatalyst. The copolymers of propylene and 1-octene containing up to 24 and 9.3 mol % units of the second comonomer are prepared with the homogeneous and heterogenized systems, respectively. The copolymerization of propylene with 1-octene in liquid propylene shows the azeotropic (ideal) character, and the distribution of comonomer units in the copolymers is close to statistical. The modification of PP with even small amounts of 1-octene affects the regularity of polymer chains, molecular-mass characteristics of the copolymers, their melting temperature, and the degree of crystallinity and makes it possible to vary their rigidity and elasticity in a wide range. The character of changes in thermal and mechanical properties is almost the same for the copolymers synthesized with homogeneous and heterogenized catalysts.

引用

页码：15 / 25

页数：11

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