| 亚环烷基桥联茂金属催化乙烯与α-烯烃共聚合的研究 |
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| 引用本文： | 李波,杨敏,刘盘阁,刘宾元,闫卫东,王佰全.亚环烷基桥联茂金属催化乙烯与α-烯烃共聚合的研究[J].精细石油化工,2008,25(6). |
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| 作者姓名： | 李波 杨敏 刘盘阁 刘宾元 闫卫东 王佰全 |
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| 作者单位： | 1. 河北工业大学化工学院高分子科学与工程研究所,天津,300130
2. 南开大学化学系元素有机化学国家重点实验室,天津,300071 |
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| 摘 要： | 采用两种亚环己基桥连的茂金属催化剂(CH_2)_5C](t-BuCp)_2ZrCl_2(Ⅰ)、(CH_2)_5C](t-BuCp)_2TiCl_2(Ⅱ),在助催化剂甲基铝氧烷的活化下,研究了乙烯与α-烯烃共聚合反应,考察了催化剂的结构对产物性能的影响。相同条件下,催化剂Ⅰ的共聚活性略高于催化剂Ⅱ。随着共聚单体浓度的增加,乙烯与1-己烯、1-辛烯共聚均可产生共单体效应,共聚物的熔点和结晶度均随共聚单体浓度的增加而降低。
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| 关 键 词： | 亚环烷基桥联茂金属 乙烯 α-烯烃 共聚 |
COPOLYMERIZATION OF ETHYLENE AND α-OLEFINS WITH CYCLOALKYLIDENE-BRIDGED METALLOCENE/MAO |
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| Li Bo,Yang Min,Liu Pange,Liu Binyuan,Yan Weidong,Wang Baiquan.COPOLYMERIZATION OF ETHYLENE AND α-OLEFINS WITH CYCLOALKYLIDENE-BRIDGED METALLOCENE/MAO[J].Speciality Petrochemicals,2008,25(6). |
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| Authors: | Li Bo Yang Min Liu Pange Liu Binyuan Yan Weidong Wang Baiquan |
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| Abstract: | Copolymerization of ethylene and α-olefins via novel cyclohexylidene-bridged metallocenes (CH_2)_5 C](t-BuCp)_2 ZrCl_2(Ⅰ)or (ca_2)_5 C](t-BuCp)_2 TICl_2(Ⅱ)activated with MAO was studied. The effects of catalyst structure on the catalytic properties were investigated.In copolymerization,the activity of metallocene Ⅱ is lower than that of catalyst Ⅰ.Both catalyst Ⅰ and Ⅱ present a comonomer effect in copolymerization activity by increasing the initial concentration of a-olefin(1-hexene,1-oc- tene).The melting points of the copolymers decrease with increasing comonomer.The enthalpies of fusion decrease greatly due to the lower crystallinity. |
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| Keywords: | cyclohexylidene-bridged metallocenes ethylene α-olefins copolymerization |
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