摘要
采用改进的种子乳液聚合法制得了微米尺度表面羧基功能化的超顺磁性复合微球。通过动态光散射粒度仪(DLS)、透射电子显微镜(TEM)、振动样品磁强计(VSM)对所制备的磁性功能聚合物微球的各项性能进行了表征。通过热失重分析(TGA)、热质联用分析(TGA-MS)、拉曼光谱(RS)、X射线光电子能谱(XPS)对磁性功能聚合物微球的热重曲线特征和热失重测试过程中的组分变化进行了系统分析。研究表明:在氮气气氛测试条件下,磁性功能聚合物微球在800°C后仍发生高温再失重,通过分析提出了更为精确的计算微球中磁性物质质量分数的方法。
Monodisperse carboxyl-functionalized superparamagnetic polymer microspheres were prepared by modified seed-emulsion copolymerization.The properties of obtained microspheres were characterized by transmission electron microscopy（TEM）,thermogravimetric analysis（TGA） and vibrating sample magnetometry（VSM）.The features of TGA curves of functionalized magnetic polymer microspheres and the changes of component during the measurements were revealed by a systematic analysis via thermogravimetry and mass spectrometry（TG-MS）,Raman spectroscopy（RS）,X-ray photoelectron spectroscopy（XPS）.Results showed that an unusual mass loss occurred at 800 °C or higher temperature in nitrogen atmosphere and a more accurate method to calculate the magnetite content was proposed.
出处
《功能高分子学报》
CAS
CSCD
北大核心
2011年第2期137-142,共6页
Journal of Functional Polymers
基金
国家自然科学基金(20874061
21075082)
上海市科委(0852nm04100
2010B057)
关键词
磁性聚合物微球
热重曲线
残炭还原
磁性物质质量分数
magnetic polymer microspheres
TGA curves
reduction of iron oxide by carbon
mass fraction of magnetic substances
