分别在亚乙基双(茚基)二胺化铪茂(简称1)和异亚丙基(环戊二烯基)(1-芴基)二甲基锆茂(简称2)催化作用下,对乙烯(E)与1-己烯(H)无规共聚合进行了研究.结果表明,在单体浓度比[H]/[E]较小时共聚合速率随单体浓度比增加而增加,进一步增加单体浓度比则导致共聚合速率降低.催化体系1/Al(1Bu)2H/[Ph3C][B(C6F5)4](3)催化共聚活性比2/MAO高得多.两单体竞聚率乘积(rE×rH)小于1,表明聚合物为无规共聚物.两催化体系共聚合能力相当.DSC分析显示,共聚物具有较宽的熔融峰,甚至出现双熔点.与催化体系2/MAO相比,1/Al(iBu)2H/3催化共聚物具有更高的分子量和更宽的密度变化范围.
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