Biphasic ethylene polymerization with a diiminenickel catalyst

被引：1
|
作者：
Pinheiro, MF [1 ]
Mauler, RS [1 ]
de Souza, RF [1 ]
机构：
[1] Univ Fed Rio Grande do Sul, Inst Quim, BR-91501970 Porto Alegre, RS, Brazil
来源：
MACROMOLECULAR RAPID COMMUNICATIONS | 2001年 / 22卷 / 06期
关键词：
D O I：
10.1002/1521-3927(20010301)22:6<425::AID-MARC425>3.3.CO;2-6
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Ethylene is polymerized with 1,4-bis(2,6-disopropylphenyl)acenaphthenediiminenickel (II) dichloride dissolved in the ionic liquid 1-butyl-3-methylimidazolium organochloraluminate under mild reaction conditions(pressure of 1050 mbar, reaction temperature between -10 degreesC and +10 degreesC). The catalyst solution can be reused in successive ethylene polymerization cycles upon addition of an alkylaluminum cocatalyst, showing enhanced activities and producing polyethylenes with bimodal molecular weight distributions suggesting the formation of non-uniform active centers.
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页码：425 / 428
页数：4
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