Polymerization-Rendered Polypropylene/Clay Nanocomposites: An In-Reactor Polymerization and Properties
Polyolefins (PE and PP, etc) are among the most interesting polymers deemed to benefit the most from the formation of nanocomposite with clay (mostly montmorillonite, MMT ) due to their widespread applications.In particular, isotactic polypropylene (i-PP), one of the most important class of polyolefins possessing many superior material properties in terms of mechanical, thermal, and processing requirements, has been asserted and partially realized with immense advantages for combining with MMT to produce high-performance polypropylene materials for advanced applications.However, i-PP, like other polyolefins, is of chemically nonpolar characteristic, which dictates its nearly complete immiscibility with inorganic MMT. This has raised serious problems for a direct polymer intercalation method (including melt and solution intercalations) to render effective nanoscopic dispersion of MMT in i-pp. In order to successfully prepare i-PP and other polyolefins-based nanocomposites, several research groups have explored a so-called in situ polymerization method that avoids the inconvenient polymer intercalation process by allowing olefin monomers to grow to polymers in situ inside MMT interlayer gallery. As the unfavorable thermodynamic obstacle is bypassed, the in situ polymerization technique has been generally accepted as a convenient means to access polyolefin/MMT nanocomposites.
Jin-Yong Dong
CAS Key Laboratory of Engineering Plastics,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China
国际会议
5th International Symposium on High-Tech Polymer Materials(HTPM-V)(第五届国际高技术高分子材料学术会议)
北京
英文
89-90
2008-10-27（万方平台首次上网日期，不代表论文的发表时间）