期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 13, 期 8, 页码 1920-1925出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b301653f
关键词
-
The grafting and catalytic activity of a metathesis catalyst on well defined silica nanoparticles is described. The aim of this was to test the catalysis properties of a ligand-linked catalyst in ring-opening metathesis polymerization and also the possibility to obtain controlled hybrid materials. This was carried out by reaction of a synthesized hydroxy functionalized phosphine Cy2P(CH2)(10)OH with Cl2Ru(PPh3)(2)(=CH - Ph), leading to a metathesis catalyst bearing a hydroxy group at the end of a ligand. This group was reacted with well defined silica nanoparticles with a diameter of 200 nm, that had acyl chloride functions at their surface. The grafting density was calculated from thermogravimetry experiments and found to be around 7 mumol m(-2). The activity of the catalyst was tested for the ring-opening polymerization of norbornene. This showed that a fraction as high as 30% of the catalyst could initiate the polymerization and that the polymerization proceeded until completion. TEM characterization revealed that in diluted solutions, core - shell morphologies could be obtained. The efficiency of the polymerization may therefore lead to control of the thickness of the polymer coating.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据