| 丙烯聚合用TiCl_4/MgCl_2催化剂的研究——聚合温度和烷基铝的影响 |
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| 引用本文： | 钟赤锋,高明智,毛炳权.丙烯聚合用TiCl_4/MgCl_2催化剂的研究——聚合温度和烷基铝的影响[J].高分子学报,2006(1):141-145. |
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| 作者姓名： | 钟赤锋 高明智 毛炳权 |
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| 作者单位： | 中石化北京化工研究院,聚烯烃国家工程研究中心,北京,100013 |
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| 摘 要： | 研究了不同助催化剂和不同聚合温度对催化剂TiCl4/MgCl2/9,9-双(甲氧基甲基)芴(BMMF)丙烯聚合性能的影响.研究结果发现该催化剂在高温(100℃)聚合时,采用还原能力和络合能力较弱的烷基铝(Hex3Al)为助催化剂可以得到高的立构选择性(97%)和高活性.100℃聚合时不同的助催化剂对催化剂得到的聚丙烯结构有重要影响.助催化剂为Me3Al聚合得到的中等等规聚丙烯含量比其他烷基铝高.助催化剂为Et3Al聚合得到聚丙烯链结构中含有少量乙烯共聚单元;而助催化剂为Me3Al,iBu3Al和Hex3Al聚合得到聚丙烯链结构中没有发现共聚单元.
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| 关 键 词： | 聚丙烯 Ziegler-Natta催化剂 烷基铝 聚合温度 |
| 收稿时间： | 2004-09-17 |
| 修稿时间： | 2004-11-03 |
STUDIES ON TiCl4/MgCl2 CATALYSTS FOR PROPYLENE POLYMERIZATION--THE INFLUENCES OF COCATALYST AND TEMPERATURE |
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| ZHONG Chifeng,GAO Mingzhi,MAO Bingquan.STUDIES ON TiCl4/MgCl2 CATALYSTS FOR PROPYLENE POLYMERIZATION--THE INFLUENCES OF COCATALYST AND TEMPERATURE[J].Acta Polymerica Sinica,2006(1):141-145. |
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| Authors: | ZHONG Chifeng GAO Mingzhi MAO Bingquan |
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| Institution: | SINOPEC Beijing Research Institute of Chemical Industry, Polyofins National Engineering Research Ceater, Beijing 100013 |
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| Abstract: | The performances of propylene polymerization with a TiCl_4/MgCl_2/9,9bis(methoxymethyl)fluorine(BMMF) catalytic system in the absence of external donor were studied at various temperatures.The influences of alkylaluminiums were investigated.The results showed that(i-Bu_3Al) and(Hex_3Al,)which showed weaker coordination and alkylation than(Et_3Al) and(Me_3Al,)resulted in higher activity and isospecificity at 100℃.With(Me_3Al) the catalyst produced higher proportion of steroblock polypropylene than with other alkylaluminiums.The isotactic polypropylene obtained with Et_3Al contained ethylene units when the ratio of Al to Ti was 150 at 100℃.However,the isotactic polypropylenes obtained with iBu_3Al and Hex_3Al at 100℃ did not contain isobutene and hexene units. |
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| Keywords: | Polypropylene Ziegler-Natta catalyst Alkylaluminium Polymerization temperature |
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