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- Title
Studies on the synthesis of low molecular weight, one-dimensional polyanilines prepared by fast emulsion polymerization using ( n-dodecylbenzenesulfonic acid)/HCl emulsifiers.
- Authors
Wu, Yi‐Jhen; Ho, Ko‐Shan; Cheng, Yu‐Wei; Chao, Liang; Wang, Yen‐Zen; Hsieh, Tar‐Hwa; Ho, Tsung‐Han; Han, Yu‐Kai
- Abstract
Low molecular weight polyaniline nanotubes were prepared by fast emulsion polymerization in the presence of both n-dodecylbenzenesulfonic acid (DBSA) and HCl(aq). The anilinium monomers associated with DBSA emulsifiers were found to self-arrange into strands of associated cylindrical micelles before polymerization, as monitored by their optical activity and optical image. In the presence of some HCl(aq), the monomer-associated cylindrical micelles expanded and the polymerization rate could be speeded up. It was found that the low molecular weight (viscosity-averaged molecular weight) polyaniline obtained can easily lead to the formation of highly conductive, one-dimensional nanotubes or nanofibers monitored by the variation of optical activities and λmax of the UV-visible-near IR spectra during polymerization. The DBSA/HCl ratio played an important role in the eventual properties and morphologies of the one-dimensional polyanilines, which can be illustrated by conductivity, SEM and transmission electron microscopy measurements. The resultant one-dimensional polyaniline nanotubes can be arranged into a layered structure by orientation, illustrated by AFM and wide-angle X-ray diffraction. © 2012 Society of Chemical Industry
- Subjects
POLYANILINES; NANOTUBES; POLYMERIZATION; OPTICAL images; TRANSMISSION electron microscopy
- Publication
Polymer International, 2013, Vol 62, Issue 4, p581
- ISSN
0959-8103
- Publication type
Article
- DOI
10.1002/pi.4313