...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Preparation and characterization of agglomerated porous hollow silica supports for olefin polymerization catalyst
【24h】

Preparation and characterization of agglomerated porous hollow silica supports for olefin polymerization catalyst

机译：烯烃聚合催化剂用聚结多孔空心二氧化硅载体的制备与表征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Self-prepared porous hollow silica (PHS) nanoparticles were agglomerated with an oil (kerosene)-ammonia method and used as a novel support of metallocene catalysts for olefin polymerization. Transmission electron microscopy (TEM), scanning electron microcopy (SEM), small-angle X-ray diffraction (SA-XRD) and nitrogen adsorption-desorption were employed to characterize the morphologies and mesostructures of the PHS particles and agglomerated PHS particles. It was found that the agglomerated PHS particles had an average diameter between 15 and 30 mu m, a specific surface area of 214 m(2)/g, a pore diameter of 11-18 nm and a pore volume of 1.41 mL/g. Metallocene catalysts prepared with the agglomerated PHS as support demonstrated a very high activity of 8350 g PE/gCata. for ethylene polymerization due to their particular morphology and mesostructures. Analysis with Differential Scanning Calorimetry (DSC), SEM, TEM and molecular weight analysis indicated that the polyethylene product was composed of tiny spherical particles with good crystalline and narrow molecular weight distribution, and the morphology and structure of the individual PHS support particle remained unchanged in polyethylene following the polymerization. (C) 2007 Published by Elsevier B.V.
机译：自制备的多孔空心二氧化硅（PHS）纳米粒子通过油（煤油）-氨法团聚，并用作茂金属催化剂的新型载体，用于烯烃聚合。利用透射电子显微镜（TEM），扫描电子显微镜（SEM），小角X射线衍射（SA-XRD）和氮吸附-脱附来表征PHS颗粒和团聚PHS颗粒的形貌和介观结构。发现附聚的PHS颗粒具有15至30μm的平均直径，214m（2）/ g的比表面积，11-18nm的孔径和1.41mL / g的孔体积。以团聚的PHS为载体制备的茂金属催化剂显示出8350 g PE / gCata的极高活性。乙烯聚合由于其特殊的形态和介观结构用差示扫描量热法（DSC），SEM，TEM和分子量分析法分析表明，聚乙烯产物由微小的球形颗粒组成，具有良好的结晶性和窄的分子量分布，并且单个PHS载体颗粒的形貌和结构保持不变。聚合后的聚乙烯。 （C）2007由Elsevier B.V.发布

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号