• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Characterization of magnetic poly(methyl methacrylate) microspheres prepared by the modified suspension polymerization
【24h】

Characterization of magnetic poly(methyl methacrylate) microspheres prepared by the modified suspension polymerization

机译：改性悬浮聚合法制备的磁性聚甲基丙烯酸甲酯微球的表征

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

The study focuses on the characterization of the superparamagnetic microspheres of poly(methyl methacrylate) (PMMA) prepared by the modified suspension polymerization. The nano-sized oleic acid-coated magnetite particles (OMP) mixed with methyl methacrylate (MMA) monomers and divinylbenzene were employed to produce the nonporous superparamagnetic PMMA microspheres. The morphology, composition and magnetic properties of the magnetic PMMA microspheres were characterized with the scanning electron microscopy, particle size analyzer, transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, and superconductor quantum interference device. As a result, the obtained PMMA microspheres had the average particle size of 1.8-6.8 mu m and magnetite content of 4.74-10.85 wt%. The corresponding saturation magnetization of the PMMA microspheres was in the range of 2.04-851 emu/g. The diameter of the PMMA microspheres showing the polydispersity significantly decreased with the higher weight ratio of OMP to MMA. On the contrary, the magnetite content and saturation magnetization of the PMMA microspheres would increase with the higher weight ratio of OMP to MMA. Furthermore, the distinct relationships between the characteristics of magnetic PMMA microspheres and the weight ratio of OMP to MMA have been proposed. The magnetic PMMA microspheres show the good stability in the solution with the pH region of 2.1-12.9. (C) 2008 Wiley Periodicals, Inc.
机译：该研究集中于通过改性悬浮聚合制备的聚（甲基丙烯酸甲酯）（PMMA）的超顺磁性微球的表征。将纳米级油酸包覆的磁铁矿颗粒（OMP）与甲基丙烯酸甲酯（MMA）单体和二乙烯基苯混合，用于生产无孔超顺磁性PMMA微球。用扫描电子显微镜，粒度分析仪，透射电子显微镜，X射线衍射，热重分析和超导体量子干涉装置对磁性PMMA微球的形貌，组成和磁性进行了表征。结果，获得的PMMA微球的平均粒径为1.8-6.8μm，磁铁矿含量为4.74-10.85wt％。 PMMA微球的相应饱和磁化强度在2.04-851 emu / g的范围内。随着OMP与MMA的重量比增加，显示出多分散性的PMMA微球直径显着减小。相反，随着OMP与MMA的重量比增加，PMMA微球的磁铁矿含量和饱和磁化强度将增加。此外，已经提出了磁性PMMA微球的特性与OMP与MMA的重量比之间的明显关系。磁性PMMA微球在pH值为2.1-12.9的溶液中显示出良好的稳定性。 （C）2008 Wiley期刊公司

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