PREPARATION OF BRANCHED POLYETHYLENE USING Ti-Co COMPLEX CATALYSTS

ZHANG Qixing; HU Mingpeng; FAN Xingang; WANG Haihua

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PREPARATION OF BRANCHED POLYETHYLENE USING Ti-Co COMPLEX CATALYSTS

Research Article | 更新时间：2021-03-19

- PREPARATION OF BRANCHED POLYETHYLENE USING Ti-Co COMPLEX CATALYSTS
- Acta Polymerica Sinica Issue 3, Pages: 403-408(2003)
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- Published：20 June 2003，
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ZHANG Qixing, HU Mingpeng, FAN Xingang, WANG Haihua. PREPARATION OF BRANCHED POLYETHYLENE USING Ti-Co COMPLEX CATALYSTS. [J]. Acta Polymerica Sinica (3):403-408(2003)
DOI：

ZHANG Qixing, HU Mingpeng, FAN Xingang, WANG Haihua. PREPARATION OF BRANCHED POLYETHYLENE USING Ti-Co COMPLEX CATALYSTS. [J]. Acta Polymerica Sinica (3):403-408(2003) DOI：

摘要

以反应法制备了TiCl4、乙酰丙酮改性的TiCl4和Co(acac) 2 为主催化剂

SiO2 MgCl2 为载体的复合负载型催化剂 (TiCl4 CH3COCH2 COCH3 Co(acac) 2 SiO2 MgCl2 )

以烷基铝作为助催化剂

以单一乙烯单体制备了支化聚乙烯 .研究了复合催化剂的组成、烷基铝种类和聚合反应温度等对聚合反应和产物结构性能的影响 .探讨了聚合反应机理 .聚合产物经IR、13C-NMR谱分析

结果表明Ti-Co复合催化剂具有低聚原位共聚功能

可制得含有丁基、戊基、己基等各类支链结构的支化聚乙烯.

Abstract

The novel catalysts of TiCl4-CH3COCH2COCH3-Co(acac)2 supported on SiO2-MgCl2 carrier (Ti-Co complex catalyst) were prepared by reaction procedure．The polyethylene with various branching chains was synthesized by using these Ti-Co complex catalysts．The effects of the kinds of AlR3

polymerization temperation and the constituent of catalysts on the polymerization activity and the product properties were investigated．The polymerized products have analyzed by using IR and 13C-NMR spectroscopies．The results of 13C-NMR studies suggested that the polyethylene products contained n-butyl branches

pentyl branches and long branching chains(n≥6)．The polymerization mechanism was discussed also．Experimental results showed that the Ti-Co complex catalyst with Et2AlCl as cocatalyst exhibited high catalytic activity and excellent properties of oligomerization and in situ copolymerization for ethylene．

关键词

Ti-Co复合催化剂低聚和原位共聚支化聚乙烯

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