Grafting of polymers onto vapor grown carbon fiber surface by ligand-exchange reaction of ferrocene moieties of polymer with polycondensed aromatic rings of the wall-surface
Grafting of polymers onto vapor grown carbon fiber surface by ligand-exchange reaction of ferrocene moieties of polymer with polycondensed aromatic rings of the wall-surface
复制标题
DOI：
10.1016/j.polymer.2004.10.062
复制
发表时间：
2004-12
期刊：
影响因子：
4.6
通讯作者：
Gang Wei;Satoshi Saitoh;H. Saitoh;K. Fujiki;T. Yamauchi;N. Tsubokawa
中科院分区：
文献类型：
--
作者：
Gang Wei;Satoshi Saitoh;H. Saitoh;K. Fujiki;T. Yamauchi;N. Tsubokawa
为了改善气相生长碳纤维（VGCF）在溶剂中的润湿性，研究了通过二茂铁与VGCF中的缩聚芳环之间的配体交换反应，在VGCF表面接枝含乙烯基二茂铁（VFE）的共聚物。以2，2′-偶氮二异丁腈为引发剂，通过VFE与甲基丙烯酸甲酯（MMA）自由基共聚合制备了含VFE的共聚物。结果表明，在AlCl 3和Al粉存在下，VGCF与聚（VFE-co-MMA）在加热条件下发生了接枝反应，接枝率达57.5%。认为共聚物是通过二茂铁部分与VGCF的缩聚芳环之间的配体交换反应接枝到VGCF表面的。此外，在AlCl 3和Al粉存在下，通过1，1 ′-二羧基二茂铁与VGCF的配体交换反应，成功地在VGCF表面引入了羧基。VGCF上的羧基与羟基封端的聚合物反应，得到相应的聚合物接枝的VGCF。聚合物接枝的VGCF在溶剂中为接枝聚合物提供了稳定的胶体分散体。研究了溶剂蒸气中聚合物接枝VGCF制备的复合材料的电性能。
To improve the dispersibility of vapor grown carbon fiber (VGCF) in solvents, the grafting of copolymer containing vinyl ferrocene (VFE) onto the surface by ligand-exchange reaction between ferrocene moieties of the copolymer and polycondensed aromatic rings of VGCF was investigated. The copolymer containing VFE was prepared by the radical copolymerization of VFE with methyl methacrylate (MMA) using 2, 2′-azobisisobutyronitrole as an initiator. It was found that by heating of VGCF with poly(VFE-co-MMA) in the presence of AlCl3and Al powder, the copolymer was grafted onto the wall-surface: the percentage of grafting reached to 57.5%. It is considered that the copolymer was grafted onto VGCF surface by ligand-exchange reaction between ferrocene moieties of the copolymer and polycondensed aromatic rings of VGCF. In addition, carboxyl groups were successfully introduced onto VGCF wall-surface by the ligand-exchange reaction of 1,1′-dicarboxyferrocene with VGCF in the presence of AlCl3and Al powder. The carboxyl groups on VGCF were reacted with hydroxyl-terminated polymers to give the corresponding polymer-grafted VGCF. The polymer-grafted VGCF gave a stable colloidal dispersion in solvents for grafted polymer. The electric properties of composite prepared from polymer-grafted VGCF in solvent vapor were investigated.