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首页> 外文期刊>Journal of Applied Polymer Science >Gas-phase ethylene polymerization over polymer-supported metallocene catalysts
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Gas-phase ethylene polymerization over polymer-supported metallocene catalysts

机译：聚合物负载的茂金属催化剂上的气相乙烯聚合

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摘要

The activities of two (n-BuCp)(2)ZrCl2 catalysts supported on methylaluminoxane (MAO)-treated polymer particles were evaluated. The supports were spherical polymeric particles, containing macropores and prepared by suspension polymerization of 2-hydroxyethyl methacrylate, divinyl benzene, ethyl styrene, and styrene. Both catalysts had a Zr content of 0.31 mass % and an Al/Zr ratio of 185; the supports for one of the catalysts contained 59 mass % 2-hydroxyethyl methacrylate, whereas the support for the other catalyst had a 2-hydroxyethyl methacrylate content of 10 mass %. Ethylene homo- and ethylene/1-hexene copolymerization activities were determined for gas-phase operation at temperatures of 50 to 90degreesC and ethylene pressures of approximate to1.4 MPa. Polymerization activities were strong functions of temperature and 1-hexene concentration; copolymerization activities of up to 23,200 kg PE/(mol Zr h(-1)) were obtained for I-h polymerization runs. The product particle morphology was excellent, mostly spherical particles essentially without fines. Scanning electron microscopy showed that the spherical copolymer particles, for all copolymerization conditions, consisted of well-defined concentric spherical shells. (C) 2003 Wiley Periodicals, Inc. [References: 31]
机译：评价了在甲基铝氧烷（MAO）处理的聚合物颗粒上负载的两种（n-BuCp）（2）ZrCl2催化剂的活性。载体是球形聚合物颗粒，包含大孔，并且通过甲基丙烯酸2-羟乙酯，二乙烯基苯，乙基苯乙烯和苯乙烯的悬浮聚合而制备。两种催化剂的Zr含量为0.31质量％，Al / Zr比为185。用于一种催化剂的载体包含59质量％的甲基丙烯酸2-羟乙酯，而用于另一种催化剂的载体具有10质量％的甲基丙烯酸2-羟乙酯含量。在50至90℃的温度和大约1.4MPa的乙烯压力下，气相操作测定了乙烯均-和乙烯/ 1-己烯的共聚活性。聚合活性是温度和1-己烯浓度的强函数;对于I-h聚合实验，共聚活性高达23,200 kg PE /（mol Zr h（-1））。产物的颗粒形态极好，基本上为球形的颗粒基本上没有细粉。扫描电子显微镜显示，在所有共聚条件下，球形共聚物颗粒均由轮廓分明的同心球形壳组成。 （C）2003 Wiley Periodicals，Inc. [参考：31]

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