Premium
Interfacial synthesis of long polyindole fibers
Author(s) -
Koiry S. P.,
Saxena Vibha,
Sutar Dayanand,
Bhattacharya S.,
Aswal D. K.,
Gupta S. K.,
Yakhmi J. V.
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.25245
Subject(s) - polymerization , monomer , aqueous solution , polymer chemistry , fourier transform infrared spectroscopy , dichloromethane , materials science , interfacial polymerization , chemical engineering , analytical chemistry (journal) , chemistry , polymer , organic chemistry , composite material , solvent , engineering
Polyindole fibers upto a length of 1000 μm and ∼ 25 μm in diameter have been reproducibly synthesized by interfacial polymerization, which was performed at a stationary interface of aqueous (FeCl 3 solution)/organic (indole in dichloromethane) biphasic system. On the other hand, disturbing the aqueous/organic interface by constant stirring of solution—termed as bulk polymerization—resulted in globular (average size ∼ 2 μm) polyindole. The results of Fourier transform infrared spectroscopy revealed that polymerization takes place at carbon atoms located at positions 2 and 3 in indole monomer, and this has explained origin of different polyindole morphology obtained in interfacial and bulk polymerization. Cyclic voltammograms recorded as a function of scan rate indicated a high electroactivity of the synthesized polyindole. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 595–599, 2007