双功能催化剂体系催化乙烯原位聚合制备长链支化聚乙烯研究  

PREPARATION OF LONG-BRANCHING POLYETHYLENE USING A DUAL-FUNCTIONAL CATALYTIC SYSTEM

作　　者：柳忠阳[1] 贾明[1] 郭存悦[1] 贺大为[1] 胡友良[1] 

机构地区：[1]中国科学院化学研究所分子科学中心工程塑料国家重点实验室中国石油天然气集团公司催化重点实验室北京催化研究室,北京100080

出　　处：《高分子学报》2001年第6期751-754,共4页Acta Polymerica Sinica

基　　金：国家重点自然科学基金 (基金号 2 973414 1);SINOPEC联合资助项目

摘　　要：以蒙脱土负载 β 二酮二氯化锆作为乙烯齐聚催化剂与Et(Ind) 2 ZrCl2 复合组成了原位双功能聚合催化体系 ,成功地以乙烯为唯一单体唯一反应釜制备长链支化聚乙烯 ,该催化剂体系具有乙烯共聚活性高 。Long branching polyethylene was prepared by using a novel dual functional catalytic system with (acac) 2ZrCl 2/Montmorilonite/AlEt 2Cl as the ethylene oligomerization catalyst in which (acac) 2ZrCl 2 was chemically bonded in between the layers of montmorilonite (MMT) and Et(Ind) 2ZrCl 2/MAO as the ethylene copolymerization catalyst capable of incorporating ethylene oligomers,of which over 80 percent were hexene and octene, in situ to form long branching polyethylene.Selectivities for ethylene oligomerization with (acac) 2ZrCl 2 and (acac) 2ZrCl 2/MMT,relationship between (acac) 2ZrCl 2 and (acac) 2ZrCl 2/MMT with reaction time,effects of Al/Zr value on activity of (acac) 2ZrCl 2/MMT and structure of the resulting polymer were investigated.Experimental results showed that the two catalysts in the dual functional catalytic system were well matched and exhibited high copolymerization activity and improved properties of the final long branching polyethylene.

关 键 词：双功能聚合体系 蒙脱土 负载β-二酮二氯化锆 催化剂 乙烯 原位聚合 长链支化聚乙烯 

分 类 号：O631.5[理学—高分子化学]