Polymerization of ethylene and ethylene/1-hexene over Ziegler-Natta/metallocene hybrid catalysts supported on MgCl2 prepared by a recrystallization method

被引：0
|
作者：
Cho, HS [1 ]
Chung, JS [1 ]
Han, JH [1 ]
Ko, YG [1 ]
Lee, WY [1 ]
机构：
[1] Seoul Natl Univ, Coll Engn, Dept Chem Engn, Kwanak Ku, Seoul 151742, South Korea
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 1998年 / 70卷 / 09期
关键词：
recrystallized magnesium dichloride support; metallocene catalyst; Ziegler-Natta catalyst; hybrid catalysts; polymerization; ethylene; ethylene/1-hexene;
D O I：
10.1002/(SICI)1097-4628(19981128)70:9<1707::AID-APP8>3.0.CO;2-#
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
MgCl2 for use as a catalyst support was prepared by dissolution in methanol and recrystallization in n-decane, followed by vacuum-drying at 2,000 rpm. The prepared support was modified by treatment with alkylaluminum compounds. The activity profile of ethylene over the supported catalysts persisted for periods up to 1 h during the polymerization. The prepared Ziegler-Natta/metallocene hybrid catalysts exhibited the characteristics of both metallocene and Ziegler-Natta catalysts. The polymer produced by the hybrid catalysts gave bimodal peaks in differential scanning calorimetry analysis for ethylene and ethylene/1-hexene polymerization, suggesting that the polymer was composed of two different lamellar structures that were polymerized by each catalyst. (C) 1998 John Wiley & Sons, Inc.
引用
收藏
页码：1707 / 1715
页数：9
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